Topic explanation

Standard explanation

Use consistent units, state positive direction, and reject time values outside the physical interval.

Key points

• Modelling and units
• rule
• worked example
• Modelling and units: Use consistent units, state positive direction, and reject time values outside the physical interval
• CONCEPT AND RULE: Use consistent units, state positive direction, and reject time values outside the physical interval
• METHOD: For modelling and units, identify the given information and required result. Select the matching def
• Use consistent units, state positive direction, and reject time values outside the physical interval.
• Worked pattern: If t is seconds and s metres, v is m/s and a is m/s^2.

Labelled diagram