Posted by **Brian** on Sunday, February 17, 2013 at 4:11pm.

A cannon is mounted on a truck that moves forward at a speed of 5 m/s. The operator wants to launch a ball from a cannon so the ball goes as far as possible before hitting the level surface. The muzzle velocity of the cannon is 50 m/s. What angle from the horizontal should the operator point the cannon? (Answer: 49 degrees) Hint: The cannon isn't stationary.

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