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Question

In a situation the contact force by a rough horizontal surface on a body placed on it has constant magnitude. If the angle between this force and the vertical is decreased, the frictional force between the surface and the body will


A

Increase

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B

decrease

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C

Remain the same

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D

may increase or decrease

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Solution

The correct option is B

decrease


Now if the angle made by Fc and the vertical decreases then horizontal componenet decreases

As you can see the horizontal component decreases, Which in this case turns out to be frictional force.

Yes the magnitude of frictional force depends upon the angle made by Contact force and the Vertical/Horizontal


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