Pushing force making an angle 0 to the horizontal is applied on a block of weight W placed on a horizontal table. If the angle of friction is $\mathrm{\varphi }$ the magnitude of force required to move the body is equal to

• A

  $\frac{\mathrm{Wcos}\mathrm{\varphi }}{\cos (\mathrm{\theta }-\mathrm{\varphi })}$

• B

  $\frac{\mathrm{Wsin}\mathrm{\varphi }}{\cos (\mathrm{\theta }-\mathrm{\varphi })}$

• C

  $\frac{\mathrm{Wtan}\mathrm{\varphi }}{\sin (\mathrm{\theta }-\mathrm{\varphi })}$

• D

  $\frac{\mathrm{Wsin}\mathrm{\varphi }}{\tan (\mathrm{\theta }-\mathrm{\varphi })}$