Question

1. Find the momentum of a body of mass 100 g having a kinetic energy of 20 J.
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Answer 1

Answer:

m= 100g= 1/10 kg, K.E= 20J

Since, K.E.= 1/2 mv²,

Therefore,

20 = 1/2 × 1/10 × v²

or

v²= 400 or v= 20 m/s

Momentum, p= mv= 1/10 × 20 = 2 kg m/s