Question

A bullet of mass 20g is fired from a rifle of mass 8 kg with a velocity of 100 m/s the velocity of the recoil of the rifle is

Answer 1

hy
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as we know from,

conservation of momentum
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m1u1 = m2v2

(m1) mass of bullet = 20/1000 kg
( u1) velocity of bullet = 100 m / s

(m2) mass of rifle = 8kg
(v2) velocity of rifle = ?

m1u1 = m2v2

20/1000* 100 = 8*v2

2 = 8v2
2/8 = v2
1/4 =v2
0.25 m/s = v2

hope helped
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