A block of mass 30 kg is pulled up by a rope with constant speed by applying a force of 200N parallal to the slope. A B are the initial and final position of the block-:
- Work done by the force in moving the block.
- Potential energy gained by the block.
- Account for the difference in work done by the force and increase in potential energy of the block.
Your question is not complete,However we have solved the question by assuming AB=s and BC=h .
1-
Work done=Force x displacement along the direction of motion
Given that, Force F=200 N
Displacement =s (Suppose)
Therefore
W=200 x s------(i)
2-
Potential energy gained by block U=mgh
Given,
m=30kg,
g=9.8
height BC=h (Suppose)
Therefore,
U=30 x 9.8 x h=294 h-----(ii)
By putting the values of 's' and 'h'you can calculate for W and U.
3-
There is a difference in the gained potential energy and work done because while pulling the block up,some work is done against friction between surfaces of block and plane.