Physics   The following takes place at a colony on the Moon some time in the distant future: A 40 kg cannon is loaded with a 10 kg cannonball and mounted on a 6 kg platform with wheels very low to...

Physics

 

The following takes place at a colony on the Moon some time in the distant future:

A 40 kg cannon is loaded with a 10 kg cannonball and mounted on a 6 kg platform with wheels very low to the ground.  The wheeled platform is pushed and moves forward at 3 m/s horizontally.  When the cannonball is fired out, the cannon recoils (backward) with a velocity of 2 m/s relative to the ground.  The cannonball then strikes a large solid block that weighs 32N and is sitting on the edge off a 50 m high cliff and becomes embedded in it.  The combined mass is shot horizontally off the cliff.

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