14. "The work done by the frictional force on a pencil in drawing a complete circle of radius
1/π metre on the surface by a pencil of
negligible mass with a normal pressing force
N = 5 N (u = 0.5) is :
(1) + 4J (2) -3J (3) - 2 J (4) - 5J
Here the answer should be zero as displacement is zero but it's not why??
please explain it....
1/π metre on the surface by a pencil of
negligible mass with a normal pressing force
N = 5 N (u = 0.5) is :
(1) + 4J (2) -3J (3) - 2 J (4) - 5J
Here the answer should be zero as displacement is zero but it's not why??
please explain it....
Add an Answer
More Questions From This User See All