A 3 kg trolley moving at 9.5 m/s runs into a 1.5 kg trolley at rest. After the collision the first trolley continues in the same direction at 4 m/s. Find the velocity v′2 of the second trolley.
A 5 kg rifle, free to move, fires a 12 g bullet at 750 m/s. Both start at rest. Find the recoil speed V of the rifle.
An 800 kg car moving at 12 m/s runs into a stationary 1200 kg car and the two lock together. How much kinetic energy ΔK is lost in the collision?
A 1.5 kg glider moving at 7 m/s makes a perfectly elastic head-on collision with a 5 kg glider at rest on a frictionless track. Find the velocity v′2 of the second glider after the collision.
At a crossing a 1900 kg car travelling east at 13 m/s collides with a 1600 kg car travelling north at 13 m/s. The cars lock together. Find the direction θ of the wreck just after the collision, measured north of east.
A 0.6 kg ball hits a wall at 12 m/s and bounces straight back at 16 m/s. The contact lasts 10 ms. Find the average force Favg of the wall on the ball.
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