A 3 kg trolley moving at 4.5 m/s runs into a 3.5 kg trolley at rest. After the collision the first trolley continues in the same direction at 1.5 m/s. Find the velocity v′2 of the second trolley.
A 6 kg rifle, free to move, fires a 5 g bullet at 900 m/s. Both start at rest. Find the recoil speed V of the rifle.
A 1.5 kg glider moving at 8 m/s makes a perfectly elastic head-on collision with a 0.5 kg glider at rest on a frictionless track. Find the velocity v′2 of the second glider after the collision.
An 800 kg car moving at 6 m/s runs into a stationary 900 kg car and the two lock together. How much kinetic energy ΔK is lost in the collision?
A 0.45 kg ball hits a wall at 27 m/s and bounces straight back at 9 m/s. The contact lasts 25 ms. Find the magnitude of the impulse J the wall gives the ball.
A 0.45 kg ball hits a wall at 13 m/s and bounces straight back at 13 m/s. The contact lasts 5 ms. Find the magnitude of the impulse J the wall gives the ball.
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