Momentum 1D - Problem Solving

         

Two ice skaters of weights 42 kg42\text{ kg} and 84 kg84\text{ kg} push off against each other starting from a stationary position. If the 42 kg 42 \text{ kg} skater acquires a velocity of 6 m/s 6 \text{ m/s} to the right, what speed does the 84 kg 84 \text{ kg} skater acquire?

A 10.0 g10.0\text{ g} bullet is fired from a rifle of mass 4 kg. 4 \text{ kg} . If the speed of the fired bullet is 850 m/s, 850 \text{ m/s}, what is the approximate recoil speed of the rifle?

Two objects of weights 2 kg 2 \text{ kg} and 3 kg 3 \text{ kg} slide together with equal velocities of 9.0 m/s, 9.0 \text{ m/s}, and then they break apart. If the final velocity of the 3 kg 3 \text{ kg} object is 10.0 m/s, 10.0 \text{ m/s}, what is the magnitude of the final velocity of the 2 kg 2 \text{ kg} object?

A glider of mass 100 g 100 \text{ g} is moving along a horizontal straight air track at 4 m/s. 4 \text{ m/s}. It then collides with a stationary glider of mass 100 g. 100 \text{ g}. After the collision, the velocity of the first glider becomes 2 m/s 2 \text{ m/s} in the same direction as before. What is the velocity of the second glider?

An object m1(=2 kg)m_1 (= 2 \text{ kg}) which moves with a velocity of 15 m/s 15 \text{ m/s} collides with a stationary object m2(=8 kg).m_2 (= 8 \text{ kg}). After the collision, they stick to each other and move together. Find the magnitude of velocity of both objects after the collision.

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