A train moves at constant velocity of 60 mph. A cannon is stationed on a flatcar

Question

A train moves at constant velocity of 60 mph. A cannon is stationed on a flatcar moving with the train. The cannon has a muzzle velocity of 120 mph. If the gunner wishes for the cannon ball to land on top of the cannon, she should.

It is NOT choice A or D, I tried that and it said incorrect.

A train moves at constant velocity of 60 mph. A cannon is stationed on a flatcar moving with the train. The cannon has a muzzle velocity of 120 mph. If the gunner wishes for the cannon ball to land on top of the cannon, she should: (ignore air resistance) A Aim the cannon 30 degrees from the vertical, pointing forward B Aim the cannon straight up C Aim the cannon 45 degrees from vertical, pointing backward D Aim the cannon 45 degrees from the vertical, pointing forward. E Aim the cannon 30 degrees from the vertical, pointing backward.

Explanation / Answer

ANSWER IS

B) point the cannon directly upwards

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