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Q.

A car and a truck are moving with same kinetic energy. To stop them brakes exerting equal forces are applied simultaneously. Then, which of the following statements is correct?

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a

The truck stops earlier as it covers less distance.

b

The car stops earlier as it covers less distance.

c

The car and the truck stop simultaneously covering equal distances.

d

The car stops earlier though it covers the same distance as the truck before coming to stop.

answer is D.

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Detailed Solution

S=ΔK.EF⇒S=constantFt=∆p ,            p22m=KE,p=2mKE t=2m.K.EF   ; tα mtc
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