$A$ block of mass $m$ is lying on an inclined plane. The coefficient of friction between the plane and the block is $\mu$. The force $(F_1)$ required to move the block up the inclined plane will be
- A$mg \sin \theta + \mu mg \cos \theta$
- B$mg \cos \theta - \mu mg \sin \theta$
- C$mg \sin \theta - \mu mg \cos \theta$
- D$mg \cos \theta + \mu mg \sin \theta$
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