A 1500 kg car moving at 15 m/s collides head-on with a 1200 kg car moving at 7 m/s in the opposite direction. The cars lock together. Find their common velocity v′ just after the collision (positive in the first car’s direction).
A 600 kg car moving at 6 m/s collides head-on with a 600 kg car moving at 15 m/s in the opposite direction. The cars lock together. Find their common velocity v′ just after the collision (positive in the first car’s direction).
A 4.5 kg glider moving at 11 m/s makes a perfectly elastic head-on collision with a 1 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 1300 kg car moving at 23 m/s runs into a stationary 500 kg car and the two lock together. What percentage ΔK/K of the original kinetic energy is lost?
A 0.45 kg ball hits a wall at 10 m/s and bounces straight back at 15 m/s. The contact lasts 25 ms. Find the magnitude of the impulse J the wall gives the ball.
A 0.2 kg ball hits a wall at 28 m/s and bounces straight back at 20 m/s. The contact lasts 5 ms. Find the average force Favg of the wall on the ball.
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