A 490 kg cannon fires a 90 kg cannonball with a speed of
A 490 kg cannon fires a 9.0 kg cannonball with a speed of 200 m/s relative to the muzzle. The cannon is on wheels that roll without friction. when the cannon fires, what is the speed of the cannonball relative to the earth?
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a 490 kg cannon fires a 90 kg cannonball with a speed of 200 ms relative to the muzzle the cannon is on wheels that
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