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Power output of machine, horizontal recoil speed of a gun, speed of the bullet

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1. Compute the power output of a machine that lifts a 500-kg crate through a height of 20.0 m in a time of 60.0 s.

2. A 1200-kg gun mounted on wheels shoots an 8.00-kg projectile with a muzzle velocity of 600 m/s at an angle of 30.0°; above the horizontal. Find the horizontal recoil speed of the gun.

3. A 2.0-kg block of wood rests on a tabletop. A 7.0-g bullet is shot straight up through a hole in the table beneath the block. The bullet lodges in the block, and the block flies 25 cm above the tabletop. How fast was the bullet going initially?

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Solution Summary

This solution goes through exercises in classical mechanics including how to calculate power output of a machine, horizontal recoil speed of a gun and initial bullet speed.

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