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
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
- A
$\frac{{W\sin \alpha }}{{g\tan (\theta - \alpha )}}$
- B
$\frac{{W\cos \alpha }}{{\cos (\theta - \alpha )}}$
- C
$\frac{{W\sin \alpha }}{{\cos (\theta - \alpha )}}$
- D
$\frac{{W\tan \alpha }}{{\sin (\theta - \alpha )}}$
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