Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Laws of Motion

Question:

A truck and car are moving on a plane road with same kinetic Energy. They are brought to rest by application of brakes which provide equal retarding forces. Which one of the following statements is true?

Options:

Distance traveled by truck is shorter then car before coming to rest

Distance traveled by car is shorter then truck before coming to rest

Distance traveled depends on individual velocity of both the vehicles

Both will travel same distance before coming to rest

Correct Answer:

Both will travel same distance before coming to rest

Explanation:

By work energy theorem we know :

KE- KE= Work done

So in this case : Initial KE = retarding force * distance traveled

Since kinetic energy is same and retarding force is equal distance traveled will be same

Hence choice (d) is correct