Laws of Motion

Question: Pulling force making an angle $\theta $ to the horizontal is applied on a block of weight W placed on a horizontal table. If the angle of friction is $\alpha $, then the magnitude of force required to move the body is equal to

1) $\frac{{W\sin \alpha }}{{g\tan (\theta - \alpha )}}$

2) $\frac{{W\cos \alpha }}{{\cos (\theta - \alpha )}}$

3) $\frac{{W\sin \alpha }}{{\cos (\theta - \alpha )}}$

4) $\frac{{W\tan \alpha }}{{\sin (\theta - \alpha )}}$

Solution:

Explanation: No Explanation

Friction Static and Limiting Friction

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