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A 2.0 kg object moving with a velocity of 8.0 m s-¹ collides with a 4.0 kg object moving with a velocity of 5.0 m s–¹ along the same straight line. If the bodies join together on impact, calculate their common velocity if they are initially moving in the same direction.
A marksman holds a rifle of mass M = 3.00 kg loosely in his hands, so as to let it recoil freely when fired. He fires a bullet of mass m = 5.00 g horizontally with a velocity of vB = 300 m s-1. What is the recoil velocity vR of the rifle?
An object A of mass 2.0 kg moves to the right along a frictionless surface at a speed of 40 m s-1. It collides head-on with a 10 kg object B which is moving to the left at 4.0 m s-1. After the collision A recoils and moves to the left at 30 m s-1. Find final velocity of B.
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