A 3.5 kg trolley moving at 6 m/s runs into a 3.5 kg trolley at rest. After the collision the first trolley continues in the same direction at 1 m/s. Find the velocity v′2 of the second trolley.
A 1300 kg car moving at 6 m/s collides head-on with a 1100 kg car moving at 10 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 1700 kg car moving at 20 m/s runs into a stationary 500 kg car and the two lock together. How much kinetic energy ΔK is lost in the collision?
A 1.5 kg glider moving at 5 m/s makes a perfectly elastic head-on collision with a 4.5 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).
At a crossing an 800 kg car travelling east at 21 m/s collides with a 900 kg car travelling north at 16 m/s. The cars lock together. Find the speed v′ of the wreck just after the collision.
A 0.15 kg ball hits a wall at 14 m/s and bounces straight back at 4 m/s. The contact lasts 10 ms. Find the average force Favg of the wall on the ball.
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