A 2.5 kg trolley moving at 5 m/s runs into a 5 kg trolley at rest. After the collision the first trolley continues in the same direction at 0.5 m/s. Find the velocity v′2 of the second trolley.
A 1000 kg car moving at 11 m/s runs into a stationary 1900 kg car. The cars lock together. Find their common velocity v′ just after the collision (positive in the first car’s direction).
A 15 kg projectile moving horizontally at 9 m/s explodes into two fragments that move along the same line. The 14 kg fragment continues forwards at 40 m/s. Find the velocity v′2 of the 1 kg fragment (positive in the original direction).
A 1 kg glider moving at 11 m/s makes a perfectly elastic head-on collision with a 5 kg glider at rest on a frictionless track. Find the velocity v′1 of the first glider after the collision (positive in its original direction).
A 0.55 kg ball hits a wall at 14 m/s and bounces straight back at 11 m/s. The contact lasts 40 ms. Find the magnitude of the impulse J the wall gives the ball.
A 0.6 kg ball hits a wall at 13 m/s and bounces straight back at 20 m/s. The contact lasts 25 ms. Find the magnitude of the impulse J the wall gives the ball.
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