STANDARD Physics Kinetic Energy MCQ Question
A truck and a car moving with the same kinetic energy are brought to rest by the application of brakes which provide equal retarding forces. Which of them will come to rest in a shorter distance?
The truck
The car
Both will travel the same distance before coming to rest
Cannot be predicted
Correct Answer
Detailed Explanation
Work done = force × distance = change in kinetic energy. Both the truck and the car had the same kinetic energy and hence the same amount of work is needed to be done. As retarding force applied is the same for both, therefore, both the truck and the car travel the same distance before coming to rest.
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