Multiple choice

A car and a lorry both are moving with equal kinetic energies. If an equal breaking force is applied on both, then before coming to rest

  1. the car will cover a greater distance

  2. the lorry will cover a greater distance

  3. both will cover the same distance

  4. the distance covered by them will depend only on their respective velocities
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Work done by the braking force equals the change in kinetic energy. Since both have the same initial kinetic energy and the same braking force, the work done to stop them (F * d) is equal, meaning the distance d must be the same.

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