There are n cannons on a railway car. the total mass of the car and the cannons is m. the cannons can ? re cannon balls of mass m at a speed u with respect to the car regardless of the state of motion of the car. initially the car is at rest. if cannons are ? red horizontally in the direction of the back of the car, the car moves forward.
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There are n cannons on a railway car. the total mass of the car and the cannons is m. the cannons ca...
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