Solve the following numerical problems. 1. Calculate the work done on the body by a force of 500 N if the body moves 7.5 m in
the direction of the force.
2. Find out the magnitude of force acting on a box when 1000 J of work is done to displace it by 5 m.
3. A load of mass 30 kg is lifted up by 7.0 m. Calculate the work done. (Take g = 9.8 m s.)
4. A 20-kg ball is thrown upward with a speed of 4 m s-1.
(a) Find its potential energy when it
reaches the highest point.
(b) Calculate the maximum height it
reaches.
the direction of the force.
2. Find out the magnitude of force acting on a box when 1000 J of work is done to displace it by 5 m.
3. A load of mass 30 kg is lifted up by 7.0 m. Calculate the work done. (Take g = 9.8 m s.)
4. A 20-kg ball is thrown upward with a speed of 4 m s-1.
(a) Find its potential energy when it
reaches the highest point.
(b) Calculate the maximum height it
reaches.
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