PhysicsChapter 2: Kinematics

2.3.2 Velocity

Velocity

In everyday language, we often use "speed" and "velocity" as if they mean the same thing. However, in physics, velocity is a more specific concept. While speed tells you only how fast an object is moving, velocity tells you both how fast it is moving and in which direction. This makes velocity a vector quantity, which is essential for describing motion accurately.

Definition

Velocity is the measure of the rate of change of displacement with the passage of time. It is a vector quantity, meaning it has both magnitude (speed) and direction.

Mathematically: velocity = displacementelapsed time or v = Δ dΔ t

Alternatively, it can be written as: v = d_f - d_it_f - t_i where d_f is the final position, d_i is the initial position, t_f is the final time, and t_i is the initial time.

Main Idea

The main idea is that velocity is speed with direction. It describes not only how fast an object is moving but also the direction of its motion. For example, a car traveling at 60 km/h has a speed of 60 km/h. But if it is traveling at 60 km/h North, that is its velocity. Velocity is a vector quantity because it has the same direction as the displacement vector.

Core Concept

Velocity as a Vector Velocity is a vector quantity. This means it has both magnitude and direction. The magnitude of velocity is the speed of the object. The direction of velocity is the same as the direction of the displacement.

The Formula The formula for velocity is: v = Δ dΔ t where: - v is the velocity (a vector). - Δ d is the displacement (a vector). - Δ t is the elapsed time (a scalar).

Units The SI unit of velocity is metre per second (m/s or m·s^-1), the same as speed.

Example from Text The text explains: "For straight-line motion in one direction, speed and velocity have same magnitudes because the lengths of the distance and the displacement are the same. The distinction between them in this case is that a displacement direction must be specified for the velocity."

Its speed is 100 m / 10 s = 10 m/s.
Its velocity is 10 m/s East.

The magnitude is the same, but velocity includes the direction.

Detailed Explanation

Velocity is a fundamental concept in kinematics. It describes the rate at which an object changes its position, including the direction of that change.

Speed is a scalar: it has magnitude only.
Velocity is a vector: it has magnitude and direction.

This difference is crucial. For example, if a car is moving around a circular track at a constant speed of 20 m/s, its speed is constant, but its velocity is continuously changing because its direction is continuously changing.

When are Speed and Velocity Equal in Magnitude? The text states that for straight-line motion in one direction, speed and velocity have the same magnitudes. This is because the distance traveled equals the displacement in this case. However, for motion in a curved path or for motion that changes direction, the distance is greater than the displacement, so the speed is greater than the magnitude of the velocity.

The Direction of Velocity The direction of velocity is the same as the direction of displacement. If you move 10 m to the East, your displacement is 10 m East, and your velocity is also directed East. If you then move 10 m to the West, your displacement for that segment is 10 m West, and your velocity is directed West.

Intermediate Level

In physics, velocity is a vector quantity, which means it follows the rules of vector algebra. When you add velocities, you must account for their directions. For example, if a boat is moving at 5 m/s relative to the water and the water is moving at 3 m/s relative to the shore, the boat's velocity relative to the shore depends on the direction of the water's flow. If the boat is moving in the same direction as the water, its velocity relative to the shore is 8 m/s. If it is moving in the opposite direction, its velocity is 2 m/s. This shows how direction (and thus velocity) affects the outcome of motion problems. Velocity is also the basis for defining acceleration, which is the rate of change of velocity.

Important Points

- Velocity is the rate of change of displacement.
- It is a vector quantity (magnitude and direction).
- The formula for velocity is v = Δ d / Δ t.
- The SI unit is metre per second (m/s).
- The direction of velocity is the same as the direction of displacement.
- For straight-line motion in one direction, speed and velocity have the same magnitude.

Remember

- Velocity: Displacement / Time. Vector.
- Speed: Distance / Time. Scalar.
- Key Difference: Velocity has direction.
- Example: 60 km/h is speed. 60 km/h North is velocity.
- Direction: Same as displacement.

Common Mistakes

- Forgetting the direction: Velocity is a vector, so it must have a direction. Saying "the velocity is 60 km/h" is incomplete. It should be "60 km/h North" or "60 km/h in the positive x-direction."
- Confusing velocity with speed: Speed is a scalar (magnitude only). Velocity is a vector (magnitude and direction). They are not the same.
- Assuming speed equals velocity magnitude for curved paths: For a curved path, the distance is greater than the displacement, so speed is greater than the magnitude of velocity.

Quick Revision

Velocity is a vector quantity that measures the rate of change of displacement. It is defined as the displacement divided by the time taken, and it includes both magnitude (speed) and direction. The SI unit of velocity is metre per second (m/s). For straight-line motion in one direction, speed and velocity have the same magnitude, but velocity includes the direction.

60-Second Revision

It tells you how fast AND in which direction.
Formula: v = Δ d / Δ t.
Unit: m/s.
Vs. Speed: Speed is a scalar (magnitude only), velocity is a vector (magnitude + direction).
Example: 60 km/h North is velocity. 60 km/h is speed.

Frequently Asked Questions (FAQs)

Q1. What is velocity?
Answer: Velocity is the rate of change of displacement with respect to time. It is a vector quantity, meaning it has both magnitude (speed) and direction.

Q2. What is the formula for velocity?
Answer: The formula for velocity is:
v = Δ dΔ t
where Δ d is the displacement and Δ t is the elapsed time.

Q3. What is the SI unit of velocity?
Answer: The SI unit of velocity is metre per second (m/s or m·s^-1).

Q4. Is velocity a scalar or a vector?
Answer: Velocity is a vector quantity. It has both magnitude and direction.

Q5. How is velocity different from speed? Answer: Speed is a scalar quantity (magnitude only), while velocity is a vector quantity (magnitude and direction). Speed tells you how fast an object is moving, while velocity tells you how fast and in which direction.

Q6. What is the direction of the velocity vector?
Answer: The direction of the velocity vector is the same as the direction of the displacement vector.

Q7. Can an object have a constant speed but a changing velocity?
Answer: Yes. If an object moves in a circular path at a constant speed, its velocity is continuously changing because its direction is continuously changing.

Multiple Choice Questions (MCQs)

Q1. Velocity is defined as:
A. Distance divided by time
B. Displacement divided by time
C. Time divided by displacement
D. Distance multiplied by time

Correct Answer: B
Explanation: The text defines velocity as the measure of displacement with the passage of time, v = Δ d / Δ t.

Q2. Velocity is a:
A. Scalar quantity
B. Vector quantity
C. Base quantity
D. Derived quantity

Correct Answer: B
Explanation: Velocity is a vector quantity because it has both magnitude and direction.

Q3. The SI unit of velocity is:
A. Metre (m)
B. Second (s)
C. Metre per second (m/s)
D. Newton (N)

Correct Answer: C
Explanation: The text states that the SI unit of velocity is metre per second (m/s).

Q4. For straight-line motion in one direction, the magnitude of velocity is:
A. Greater than speed
B. Less than speed
C. Equal to speed
D. Zero

Correct Answer: C
Explanation: The text states that for straight-line motion in one direction, speed and velocity have the same magnitudes.

Q5. Which of the following statements is true?
A. Speed includes direction, velocity does not.
B. Speed and velocity are the same.
C. Velocity includes direction, speed does not.
D. Speed is a vector, velocity is a scalar.

Correct Answer: C
Explanation: The text states that velocity describes the speed as well as the direction of a moving object, while speed does not.

Q6. If a car is moving at a constant speed of 60 km/h around a circular track, its velocity is:
A. Constant
B. Zero
C. Continuously changing
D. Equal to its speed

Correct Answer: C
Explanation: Since the direction of motion is continuously changing, the velocity is continuously changing, even though the speed is constant.

Q7. The direction of the velocity vector is:
A. Opposite to the direction of displacement
B. Perpendicular to the direction of displacement
C. The same as the direction of displacement
D. Independent of the direction of displacement

Correct Answer: C
Explanation: The text states that velocity is a vector quantity having the same direction as the displacement vector.

Q8. Which quantity is a vector?
A. Distance
B. Speed
C. Velocity
D. Time

Correct Answer: C
Explanation: Velocity is a vector because it has both magnitude and direction. Distance, speed, and time are scalars.

Q9. A car travels 100 m East in 10 seconds. Its velocity is:
A. 10 m/s
B. 10 m/s East
C. 100 m/s
D. 100 m/s East

Correct Answer: B
Explanation: Velocity = displacement/time = 100 m East / 10 s = 10 m/s East.

Q10. Which of the following is true about velocity?
A. It is always positive.
B. It has magnitude only.
C. It has magnitude and direction.
D. It is measured in newtons.

Correct Answer: C
Explanation: Velocity is a vector quantity, meaning it has both magnitude and direction.

Frequently Asked Questions (FAQs)

Q1. What is the difference between velocity and speed? Answer: Speed is a scalar quantity (magnitude only), while velocity is a vector quantity (magnitude and direction). Speed tells you how fast an object is moving, while velocity tells you how fast and in which direction.

Q2. How is velocity calculated?
Answer: Velocity is calculated as the displacement divided by the time taken:
v = Δ dΔ t
where Δ d is the displacement and Δ t is the elapsed time.

Q3. Can velocity be negative? Answer: Yes. Velocity can be negative, depending on the direction of motion relative to a chosen positive direction. For example, if you define East as positive, then a velocity to the West would be negative.

Q4. What is the difference between average velocity and instantaneous velocity?
Answer: Average velocity is the total displacement divided by the total time. Instantaneous velocity is the velocity at a specific instant in time.

Q5. If a car moves 100 m East in 10 s, what is its velocity?
Answer: Velocity = Displacement / Time = 100 m East / 10 s = 10 m/s East.

Q6. Can an object have a constant velocity but a changing speed?
Answer: No. If the velocity is constant, both the speed (magnitude) and direction must be constant. If the speed changes, the velocity changes.

Q7. How does velocity relate to displacement?
Answer: Velocity is the rate of change of displacement. The direction of velocity is the same as the direction of displacement.

Multiple Choice Questions (MCQs)

Q1. Velocity is defined as:
A. Distance divided by time
B. Displacement divided by time
C. Time divided by displacement
D. Distance multiplied by time

Correct Answer: B
Explanation: The text defines velocity as the measure of displacement with the passage of time, v = Δ d / Δ t.

Q2. Velocity is a:
A. Scalar quantity
B. Vector quantity
C. Base quantity
D. Derived quantity

Correct Answer: B
Explanation: Velocity is a vector quantity because it has both magnitude and direction.

Q3. The SI unit of velocity is:
A. Metre (m)
B. Second (s)
C. Metre per second (m/s)
D. Newton (N)

Correct Answer: C
Explanation: The text states that the SI unit of velocity is metre per second (m/s).

Q4. For straight-line motion in one direction, the magnitude of velocity is:
A. Greater than speed
B. Less than speed
C. Equal to speed
D. Zero

Correct Answer: C
Explanation: The text states that for straight-line motion in one direction, speed and velocity have the same magnitudes.

Q5. Which of the following statements is true?
A. Speed includes direction, velocity does not.
B. Speed and velocity are the same.
C. Velocity includes direction, speed does not.
D. Speed is a vector, velocity is a scalar.

Correct Answer: C
Explanation: The text states that velocity describes the speed as well as the direction of a moving object, while speed does not.

Q6. If a car is moving at a constant speed of 60 km/h around a circular track, its velocity is:
A. Constant
B. Zero
C. Continuously changing
D. Equal to its speed

Correct Answer: C
Explanation: Since the direction of motion is continuously changing, the velocity is continuously changing, even though the speed is constant.

Q7. The direction of the velocity vector is:
A. Opposite to the direction of displacement
B. Perpendicular to the direction of displacement
C. The same as the direction of displacement
D. Independent of the direction of displacement

Correct Answer: C
Explanation: The text states that velocity is a vector quantity having the same direction as the displacement vector.

Q8. Which quantity is a vector?
A. Distance
B. Speed
C. Velocity
D. Time

Correct Answer: C
Explanation: Velocity is a vector because it has both magnitude and direction. Distance, speed, and time are scalars.

Q9. A car travels 100 m East in 10 seconds. Its velocity is:
A. 10 m/s
B. 10 m/s East
C. 100 m/s
D. 100 m/s East

Correct Answer: B
Explanation: Velocity = displacement/time = 100 m East / 10 s = 10 m/s East.

Q10. Which of the following is true about velocity?
A. It is always positive.
B. It has magnitude only.
C. It has magnitude and direction.
D. It is measured in newtons.

Correct Answer: C
Explanation: Velocity is a vector quantity, meaning it has both magnitude and direction.

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2.3.2 Velocity

Sticky Notes · Quick Revision

Key Point 1

Velocity: Displacement / Time. Vector.

Key Point 2

Speed: Distance / Time. Scalar.

Key Point 3

Velocity = Speed + Direction.

Key Point 4

Direction: Same as displacement.

Key Point 5

Formula: v = Δ d / Δ t.

Key Point 6

Unit: m/s.

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PhysicsChapter 2: Kinematics

2.3.2 Velocity

Velocity

Definition

Velocity is the measure of the rate of change of displacement with the passage of time. It is a vector quantity, meaning it has both magnitude (speed) and direction.

Mathematically: velocity = displacementelapsed time or v = Δ dΔ t

Alternatively, it can be written as: v = d_f - d_it_f - t_i where d_f is the final position, d_i is the initial position, t_f is the final time, and t_i is the initial time.

Main Idea

Core Concept

Velocity as a Vector Velocity is a vector quantity. This means it has both magnitude and direction. The magnitude of velocity is the speed of the object. The direction of velocity is the same as the direction of the displacement.

The Formula The formula for velocity is: v = Δ dΔ t where: - v is the velocity (a vector). - Δ d is the displacement (a vector). - Δ t is the elapsed time (a scalar).

Units The SI unit of velocity is metre per second (m/s or m·s^-1), the same as speed.

Example from Text The text explains: "For straight-line motion in one direction, speed and velocity have same magnitudes because the lengths of the distance and the displacement are the same. The distinction between them in this case is that a displacement direction must be specified for the velocity."

Its speed is 100 m / 10 s = 10 m/s.
Its velocity is 10 m/s East.

The magnitude is the same, but velocity includes the direction.

Detailed Explanation

Velocity is a fundamental concept in kinematics. It describes the rate at which an object changes its position, including the direction of that change.

Speed is a scalar: it has magnitude only.
Velocity is a vector: it has magnitude and direction.

When are Speed and Velocity Equal in Magnitude? The text states that for straight-line motion in one direction, speed and velocity have the same magnitudes. This is because the distance traveled equals the displacement in this case. However, for motion in a curved path or for motion that changes direction, the distance is greater than the displacement, so the speed is greater than the magnitude of the velocity.

The Direction of Velocity The direction of velocity is the same as the direction of displacement. If you move 10 m to the East, your displacement is 10 m East, and your velocity is also directed East. If you then move 10 m to the West, your displacement for that segment is 10 m West, and your velocity is directed West.

Intermediate Level

Important Points

- Velocity is the rate of change of displacement.
- It is a vector quantity (magnitude and direction).
- The formula for velocity is v = Δ d / Δ t.
- The SI unit is metre per second (m/s).
- The direction of velocity is the same as the direction of displacement.
- For straight-line motion in one direction, speed and velocity have the same magnitude.

Remember

- Velocity: Displacement / Time. Vector.
- Speed: Distance / Time. Scalar.
- Key Difference: Velocity has direction.
- Example: 60 km/h is speed. 60 km/h North is velocity.
- Direction: Same as displacement.

Common Mistakes

- Forgetting the direction: Velocity is a vector, so it must have a direction. Saying "the velocity is 60 km/h" is incomplete. It should be "60 km/h North" or "60 km/h in the positive x-direction."
- Confusing velocity with speed: Speed is a scalar (magnitude only). Velocity is a vector (magnitude and direction). They are not the same.
- Assuming speed equals velocity magnitude for curved paths: For a curved path, the distance is greater than the displacement, so speed is greater than the magnitude of velocity.

Quick Revision

60-Second Revision

It tells you how fast AND in which direction.
Formula: v = Δ d / Δ t.
Unit: m/s.
Vs. Speed: Speed is a scalar (magnitude only), velocity is a vector (magnitude + direction).
Example: 60 km/h North is velocity. 60 km/h is speed.

Frequently Asked Questions (FAQs)

Q1. What is velocity?
Answer: Velocity is the rate of change of displacement with respect to time. It is a vector quantity, meaning it has both magnitude (speed) and direction.

Q2. What is the formula for velocity?
Answer: The formula for velocity is:
v = Δ dΔ t
where Δ d is the displacement and Δ t is the elapsed time.

Q3. What is the SI unit of velocity?
Answer: The SI unit of velocity is metre per second (m/s or m·s^-1).

Q4. Is velocity a scalar or a vector?
Answer: Velocity is a vector quantity. It has both magnitude and direction.

Q6. What is the direction of the velocity vector?
Answer: The direction of the velocity vector is the same as the direction of the displacement vector.

Q7. Can an object have a constant speed but a changing velocity?
Answer: Yes. If an object moves in a circular path at a constant speed, its velocity is continuously changing because its direction is continuously changing.

Multiple Choice Questions (MCQs)

Q1. Velocity is defined as:
A. Distance divided by time
B. Displacement divided by time
C. Time divided by displacement
D. Distance multiplied by time

Correct Answer: B
Explanation: The text defines velocity as the measure of displacement with the passage of time, v = Δ d / Δ t.

Q2. Velocity is a:
A. Scalar quantity
B. Vector quantity
C. Base quantity
D. Derived quantity

Correct Answer: B
Explanation: Velocity is a vector quantity because it has both magnitude and direction.

Q3. The SI unit of velocity is:
A. Metre (m)
B. Second (s)
C. Metre per second (m/s)
D. Newton (N)

Correct Answer: C
Explanation: The text states that the SI unit of velocity is metre per second (m/s).

Q4. For straight-line motion in one direction, the magnitude of velocity is:
A. Greater than speed
B. Less than speed
C. Equal to speed
D. Zero

Correct Answer: C
Explanation: The text states that for straight-line motion in one direction, speed and velocity have the same magnitudes.

Q5. Which of the following statements is true?
A. Speed includes direction, velocity does not.
B. Speed and velocity are the same.
C. Velocity includes direction, speed does not.
D. Speed is a vector, velocity is a scalar.

Correct Answer: C
Explanation: The text states that velocity describes the speed as well as the direction of a moving object, while speed does not.

Q6. If a car is moving at a constant speed of 60 km/h around a circular track, its velocity is:
A. Constant
B. Zero
C. Continuously changing
D. Equal to its speed

Correct Answer: C
Explanation: Since the direction of motion is continuously changing, the velocity is continuously changing, even though the speed is constant.

Q7. The direction of the velocity vector is:
A. Opposite to the direction of displacement
B. Perpendicular to the direction of displacement
C. The same as the direction of displacement
D. Independent of the direction of displacement

Correct Answer: C
Explanation: The text states that velocity is a vector quantity having the same direction as the displacement vector.

Q8. Which quantity is a vector?
A. Distance
B. Speed
C. Velocity
D. Time

Correct Answer: C
Explanation: Velocity is a vector because it has both magnitude and direction. Distance, speed, and time are scalars.

Q9. A car travels 100 m East in 10 seconds. Its velocity is:
A. 10 m/s
B. 10 m/s East
C. 100 m/s
D. 100 m/s East

Correct Answer: B
Explanation: Velocity = displacement/time = 100 m East / 10 s = 10 m/s East.

Q10. Which of the following is true about velocity?
A. It is always positive.
B. It has magnitude only.
C. It has magnitude and direction.
D. It is measured in newtons.

Correct Answer: C
Explanation: Velocity is a vector quantity, meaning it has both magnitude and direction.

Frequently Asked Questions (FAQs)

Q2. How is velocity calculated?
Answer: Velocity is calculated as the displacement divided by the time taken:
v = Δ dΔ t
where Δ d is the displacement and Δ t is the elapsed time.

Q4. What is the difference between average velocity and instantaneous velocity?
Answer: Average velocity is the total displacement divided by the total time. Instantaneous velocity is the velocity at a specific instant in time.

Q5. If a car moves 100 m East in 10 s, what is its velocity?
Answer: Velocity = Displacement / Time = 100 m East / 10 s = 10 m/s East.

Q6. Can an object have a constant velocity but a changing speed?
Answer: No. If the velocity is constant, both the speed (magnitude) and direction must be constant. If the speed changes, the velocity changes.

Q7. How does velocity relate to displacement?
Answer: Velocity is the rate of change of displacement. The direction of velocity is the same as the direction of displacement.

Multiple Choice Questions (MCQs)

Q1. Velocity is defined as:
A. Distance divided by time
B. Displacement divided by time
C. Time divided by displacement
D. Distance multiplied by time

Correct Answer: B
Explanation: The text defines velocity as the measure of displacement with the passage of time, v = Δ d / Δ t.

Q2. Velocity is a:
A. Scalar quantity
B. Vector quantity
C. Base quantity
D. Derived quantity

Correct Answer: B
Explanation: Velocity is a vector quantity because it has both magnitude and direction.

Q3. The SI unit of velocity is:
A. Metre (m)
B. Second (s)
C. Metre per second (m/s)
D. Newton (N)

Correct Answer: C
Explanation: The text states that the SI unit of velocity is metre per second (m/s).

Q4. For straight-line motion in one direction, the magnitude of velocity is:
A. Greater than speed
B. Less than speed
C. Equal to speed
D. Zero

Correct Answer: C
Explanation: The text states that for straight-line motion in one direction, speed and velocity have the same magnitudes.

Q5. Which of the following statements is true?
A. Speed includes direction, velocity does not.
B. Speed and velocity are the same.
C. Velocity includes direction, speed does not.
D. Speed is a vector, velocity is a scalar.

Correct Answer: C
Explanation: The text states that velocity describes the speed as well as the direction of a moving object, while speed does not.

Q6. If a car is moving at a constant speed of 60 km/h around a circular track, its velocity is:
A. Constant
B. Zero
C. Continuously changing
D. Equal to its speed

Correct Answer: C
Explanation: Since the direction of motion is continuously changing, the velocity is continuously changing, even though the speed is constant.

Q7. The direction of the velocity vector is:
A. Opposite to the direction of displacement
B. Perpendicular to the direction of displacement
C. The same as the direction of displacement
D. Independent of the direction of displacement

Correct Answer: C
Explanation: The text states that velocity is a vector quantity having the same direction as the displacement vector.

Q8. Which quantity is a vector?
A. Distance
B. Speed
C. Velocity
D. Time

Correct Answer: C
Explanation: Velocity is a vector because it has both magnitude and direction. Distance, speed, and time are scalars.

Q9. A car travels 100 m East in 10 seconds. Its velocity is:
A. 10 m/s
B. 10 m/s East
C. 100 m/s
D. 100 m/s East

Correct Answer: B
Explanation: Velocity = displacement/time = 100 m East / 10 s = 10 m/s East.

Q10. Which of the following is true about velocity?
A. It is always positive.
B. It has magnitude only.
C. It has magnitude and direction.
D. It is measured in newtons.

Correct Answer: C
Explanation: Velocity is a vector quantity, meaning it has both magnitude and direction.

You:

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2.3.2 Velocity

Sticky Notes · Quick Revision

Key Point 1

Velocity: Displacement / Time. Vector.

Key Point 2

Speed: Distance / Time. Scalar.

Key Point 3

Velocity = Speed + Direction.

Key Point 4

Direction: Same as displacement.

Key Point 5

Formula: v = Δ d / Δ t.

Key Point 6

Unit: m/s.

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Same supplied content as this Notes page (shared canonical source).

Definition

Main Idea

Core Concept

Velocity as a Vector Velocity is a vector quantity. This means it has both magnitude and direction. The magnitude of velocity is the speed of the object. The direction of velocity is the same as the direction of the displacement.

The Formula The formula for velocity is: v = Δ dΔ t where: - v is the velocity (a vector). - Δ d is the displacement (a vector). - Δ t is the elapsed time (a scalar).

Units The SI unit of velocity is metre per second (m/s or m·s-1), the same as speed.

Detailed Explanation

Intermediate Level

Important Points

Remember

Common Mistakes

Quick Revision

60-Second Revision

Frequently Asked Questions (FAQs)

Multiple Choice Questions (MCQs)

Frequently Asked Questions (FAQs)

Multiple Choice Questions (MCQs)

Did you understand this topic?

Definition

Main Idea

Core Concept

Velocity as a Vector Velocity is a vector quantity. This means it has both magnitude and direction. The magnitude of velocity is the speed of the object. The direction of velocity is the same as the direction of the displacement.

The Formula The formula for velocity is: v = Δ dΔ t where: - v is the velocity (a vector). - Δ d is the displacement (a vector). - Δ t is the elapsed time (a scalar).

Units The SI unit of velocity is metre per second (m/s or m·s-1), the same as speed.

Detailed Explanation

Intermediate Level

Important Points

Remember

Common Mistakes

Quick Revision

60-Second Revision

Frequently Asked Questions (FAQs)

Multiple Choice Questions (MCQs)

Frequently Asked Questions (FAQs)

Multiple Choice Questions (MCQs)

Did you understand this topic?

Units The SI unit of velocity is metre per second (m/s or m·s^-1), the same as speed.

Units The SI unit of velocity is metre per second (m/s or m·s^-1), the same as speed.