Key learning points

1. A dynamics trolley has a constant acceleration down a steep ramp.
2. Acceleration = change of velocity ÷ time and change in velocity = final velocity – initial velocity
3. Light gates can improve accuracy of measurement of instantaneous velocity and reduces random errors.
4. Using video recording allows for accurate measurement of small time intervals.

Common misconception

Keywords

• Acceleration - The acceleration of an object is the change in velocity per second.

• Velocity - The velocity of an object is the change in displacement per second.

• Dynamics trolley - A dynamics trolley is a wheeled object used in experiments. It moves very smoothly over flat surfaces.