A 2 kg trolley moving at 3.5 m/s runs into a 4 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 0.25 kg ball at rest is kicked. The foot pushes it with an average force of 150 N for 10 ms. Find the speed v of the ball just after the kick.
A 1300 kg car moving at 14 m/s runs into a stationary 600 kg car and the two lock together. How much kinetic energy ΔK is lost in the collision?
A 0.5 kg glider moving at 10 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).
At a crossing an 800 kg car travelling east at 23 m/s collides with a 1700 kg car travelling north at 8 m/s. The cars lock together. Find the direction θ of the wreck just after the collision, measured north of east.
A 0.1 kg ball hits a wall at 30 m/s and bounces straight back at 20 m/s. The contact lasts 5 ms. Find the magnitude of the impulse J the wall gives the ball.
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