15. A body of mass 100 kg moving with a velocity of 10 ms - makes elastic collision with a ping pang ball of lighter mass. The velocity of ping pang ball after collision is 1) 20 ms 2) -20 ms 3) 10 ms 4)-10 ms 1 -1 1 1
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A body of mass 100kg moving with a velocity of 10m/s makes elastic collision wit ping pang ball of lighter mass. the velocity of ping pang ball after collision is?
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Mass of one body = 100 kg
Velocity = 10 m/sec
Mass of other body at rest = 100 kg
Momentum = before collusion
=> 1000
Makes elastic collision wit ping pang ball of lighter mass .
The velocity of ping pang ball after collision is =
= 5 m/ sec .
Mass of the body after collusion = 200 kg .
Velocity of the system = v .
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