A truck and a car of mass 'm' and '2m' respectively are moving on a straight road with same kinetic energy . They are stopped by applying same retarding force by means of brakes. if the distance covered by the truck before coming to rest is S1 and that of the car is S2, then
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Work done =Force×distance= Change in kinetic energy.
Both the truck and the car had same kinetic energy and hence same amount of work is needed to be done. As retarding force applied is same for both, therefore, both the truck and the car travel the same distance before coming to rest.
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