How much work is done on the sack by lifting required

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Q1. The cannonball is fired at a speed of 53.0 and an angle of 31 above horizontal. A cannonball that was accidentally dropped hits the moat below in 1.40. How far from the castle wall does the cannonball hit ground?

Q2. A sack of flour of mass 5.00 rm kg is lifted vertically at a constant speed of 3.50m/s through the height of 15m.

How great a force is required? How much work is done on the sack by lifting required? What becomes of the work?

Reference no: EM1318947

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