A 1300 kg cannon, which fires a 80 kg shellwith a speed of 526 m/s relative to t

Question

A 1300 kg cannon, which fires a 80 kg shellwith a speed of 526 m/s relative to the muzzle, is set atan elevation angle of 39° above the horizontal. The cannon ismounted on frictionless rails, so that it recoils freely. What is the speed ofthe shell with respect to the Earth? At whatangle with the ground is the shell projected? A 1300 kg cannon, which fires a 80 kg shellwith a speed of 526 m/s relative to the muzzle, is set atan elevation angle of 39° above the horizontal. The cannon ismounted on frictionless rails, so that it recoils freely. What is the speed ofthe shell with respect to the Earth? At whatangle with the ground is the shell projected?

Explanation / Answer

the speed of the shellwith respect to the Earth = u = 508 m/s
The anglewith the ground of the shell = arctan(331/385) =40.7o

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