A car and a bus having the same kinetic energy are brought to rest by the application of brakes,which produces equal retarding forces. Which will come to rest in a shorter distance?

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Solution

Given that the car and the bus have equal kinetic energies.
Assume that the mass of the bus (b) is more than the mass of the car (c).
Therefore, velocity of bus is less than velocity of car.
Given that the retardation offered is same. Therefore, the object with lesser velocity, i.e. bus will get stopped quicker.

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