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Work, Energy and Power
Question
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A lorry and a car moving with same kinetic energy are brought to rest by application of brakes which provide equal retarding forces. Which of them will come to rest in a shorter distance?

Answer

Given that the two bodies are moving with the same K.E. And also, brakes are applied with equal retarding forces. Therefore, both the bodies will come to rest at the same time. 

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Some More Questions From Work, Energy and Power Chapter

Define the unit joule.

What are different units of energy?

What is watt?

Define watt.

How many joules are there in one eV?

What is the relation between kWh and Joule?

Does the body at rest possess energy?

By eating two apples, a person starts pushing the wall of room. If food value of apple is 100 calories per apple, how much work he will do in pushing the wall in one hour?