An 800 kg car moving at 24 m/s collides head-on with a 1900 kg car moving at 2 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 2000 kg car moving at 16 m/s runs into a stationary 1400 kg car. The cars lock together. Find their common velocity v′ just after the collision (positive in the first car’s direction).
A 3.5 kg glider moving at 12 m/s makes a perfectly elastic head-on collision with a 1 kg glider at rest on a frictionless track. Find the velocity v′2 of the second glider after the collision.
A 2.5 kg glider moving at 8 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 a 1700 kg car travelling east at 22 m/s collides with a 2000 kg car travelling north at 20 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 20 m/s and bounces straight back at 17 m/s. The contact lasts 5 ms. Find the magnitude of the impulse J the wall gives the ball.
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