# physics

Q. 2. A force of 100N acts on a mass of 25 kg for 5 s .What velocity does it generate?

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1. Newton #2 - Force = rate of change of momentum
so
force * time = change in momentum (impulse)

100 * 5 = 25 * v

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posted by Damon
2. Q. 3. A bullet leaves a rifle with a velocity of 100m/s and the rifle of mass 2.5 kg recoils with a
velocity of 1m/s. Find the mass of the bullet?

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posted by Rohil

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