Q. 16.     An object of mass, m is moving with a constant velocity, v. How much work should be done on the object in order to bring the object to rest?

Answers (1)

At this moment the energy of the object is :

                                                  K.E.\ =\ \frac{1}{2}mv^2

Thus in bringing the object to rest the work needed is :  =\ K.E.

                                                       W\ =\ \frac{1}{2}mv^2\ J

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