A 4 kg trolley moving at 9 m/s runs into a 5 kg trolley at rest. After the collision the first trolley continues in the same direction at 3.5 m/s. Find the velocity v′2 of the second trolley.
A 1000 kg car moving at 25 m/s runs into a stationary 1100 kg car. The cars lock together. Find their common velocity v′ just after the collision (positive in the first car’s direction).
A 5 kg glider moving at 12 m/s makes a perfectly elastic head-on collision with a 2 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 1600 kg car moving at 7 m/s runs into a stationary 1100 kg car and the two lock together. What percentage ΔK/K of the original kinetic energy is lost?
A 0.25 kg ball hits a wall at 11 m/s and bounces straight back at 10 m/s. The contact lasts 20 ms. Find the average force Favg of the wall on the ball.
A 0.35 kg ball hits a wall at 11 m/s and bounces straight back at 5 m/s. The contact lasts 10 ms. Find the average force Favg of the wall on the ball.
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