A block of mass $m$ is stationary on a rough plane of mass $M$ inclined at an angle $\theta$ to the horizontal, while the whole set up is accelerating upwards at an acceleration $\alpha$. If the coefficient of friction between the block and the plane is $\mu$, then the force that the plane exerts on the block is
A block of mass $m$ is stationary on a rough plane of mass $M$ inclined at an angle $\theta$ to the horizontal, while the whole set up is accelerating upwards at an acceleration $\alpha$. If the coefficient of friction between the block and the plane is $\mu$, then the force that the plane exerts on the block is
- [KVPY 2009]
- A
$m(g+a)$ upwards
- B
$m g \cos \theta$ normal to the plane
- C
resultant of $m g \cos \theta$ normal to the plane and $\mu m g \cos \theta$ along the plane
- D
resultant of $m(g+a) \cos \theta$ normal to the plane and $\mu m g \cos \theta$ along the plane
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