a boypulling a cart by supplying a constant force of 8N on a straight path of 20 m. on a round about of 10m diameter he forgets the path and takes one and a half turn and then continues on the straight path for another 20m. find the net work done by the boy on the cart.

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Solution

the total displaced of the cart will be equal tot he diameter of the circle. This is because the cart ends up at a distance vertically adjacent to its initial position separated by a distance that is equal to the circle's diameter.
Thus,
W = F.s = 8N.10m
so,
work done
W = 80 J

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Question 12
A boy is moving on a straight road against a frictional force of 5 N. After travelling a distance of 1.5 km he forgot the correct path at a round about of radius 100 m. However, he moves on the circular path for one and a half cycle and then he moves forward up to 2.0 km. Calculate the work done by him.

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a boypulling a cart by supplying a constant force of 8N on a straight path of 20 m. on a round about of 10m diameter he forgets the path and takes one and a half turn and then continues on the straight path for another 20m. find the net work done by the boy on the cart.

the total displaced of the cart will be equal tot he diameter of the circle. This is because the cart ends up at a distance vertically adjacent to its initial position separated by a distance that is equal to the circle's diameter.Thus,W = F.s = 8N.10mso,work doneW = 80 J

the total displaced of the cart will be equal tot he diameter of the circle. This is because the cart ends up at a distance vertically adjacent to its initial position separated by a distance that is equal to the circle's diameter.
Thus,
W = F.s = 8N.10m
so,
work done
W = 80 J