Question #102945

A 5.5-kg rifle fires an 11 g bullet with a velocity of 1000 m/s. Question: what is the recoil velocity of the rifle

Expert's answer

From the conservation of momentum:

"m_1v_1+m_2v_2=0\\to v_1=-\\frac{m_2v_2}{m_1}=-\\frac{0.011\\cdot 1000}{5.5}=-2m\/s"

Answer. "-2m\/s" in the opposite direction to the direction of motion of the bullet.

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