Question

A block weighing 20kgf is pulled up a slope of length 5m and vertical height 4m at a cinstant speed by a constant force of 150N . Taking g=10N/kg, calculate:
1) the work done by the force in moving the block 5m along the slope
2) the increase in gravitational potential energy of the block
3) Give reason for the difference in answer to part 1) & 2)

Answer 1

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