Physics-
General
Easy
Question
A disc of mass m and radius R is placed over a plank of same mass m. There is sufficient friction between disc and plank to prevent slipping. A force F is applied at the centre of the disc. Force of friction between the disc and the plank is :-
- F/2
- F/4
- F/3
- 2F/3
The correct answer is: F/4
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