A block of mass m slides down an incline...

A block of mass m slides down an inclined plane which makes an angle `theta` with the horizontal. The coefficient of friction between the block and the plane is `mu`. The force exerted by the block on the plane is

`mg cos theta`

`sqrt(mu^(2) + 1) mg cos theta`

`(mumg cos theta)/(sqrt(mu^(2) + 1))`

`mumg theta`

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