A 1900 kg car moving at 20 m/s collides head-on with an 800 kg car moving at 3 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 11 m/s runs into a stationary 900 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 9 m/s makes a perfectly elastic head-on collision with a 4 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 1 kg glider moving at 4 m/s makes a perfectly elastic head-on collision with a 0.5 kg glider at rest on a frictionless track. Find the velocity v′2 of the second glider after the collision.
At a crossing a 1500 kg car travelling east at 25 m/s collides with a 1200 kg car travelling north at 22 m/s. The cars lock together. Find the speed v′ of the wreck just after the collision.
A 0.2 kg ball hits a wall at 11 m/s and bounces straight back at 19 m/s. The contact lasts 5 ms. Find the average force Favg of the wall on the ball.
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