Question

Two objects of mass 100 g and 200 g are moving
along the same line and in same direction with
velocities 2 ms-1 and 1 ms-1. They collide and stick
together. The loss in kinetic energy of 100 g mass
is

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Answer 1

velocity = 2m/s

kinetic energy = 1/2mv²

= 1/2 * 100 * 2*2

= 200 joule