A 1900 kg car moving at 5 m/s collides head-on with a 1000 kg car moving at 15 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 1300 kg car moving at 19 m/s runs into a stationary 1300 kg car. The cars lock together. Find their common velocity v′ just after the collision (positive in the first car’s direction).
A 600 kg car moving at 25 m/s runs into a stationary 1900 kg car and the two lock together. How much kinetic energy ΔK is lost in the collision?
A 0.5 kg glider moving at 3 m/s makes a perfectly elastic head-on collision with a 2.5 kg glider at rest on a frictionless track. Find the velocity v′2 of the second glider after the collision.
At a crossing a 1800 kg car travelling east at 19 m/s collides with an 800 kg car travelling north at 9 m/s. The cars lock together. Find the speed v′ of the wreck just after the collision.
A 0.4 kg ball hits a wall at 11 m/s and bounces straight back at 12 m/s. The contact lasts 50 ms. Find the magnitude of the impulse J the wall gives the ball.
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