Question

Find the force required to move a load of 300 N up a rough plane, the force being
applied parallel to the plane. The inclination of the plane is such that a force of 60
N inclined at 30o to a similar smooth plane would keep the same load in
equilibrium. The coefficient of friction is 0.3.

Answer 1

Answer:

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Explanation:

Force required to move body upward, F

1

=mgsinθ+μmgcosθ

Force required to prevent sliding, F

2

=mgsinθ−μmgcosθ

mgsinθ+μmgcosθ=3(mgsinθ−μmgcosθ)

As, F

1

=3F

2

⇒μ=

2

3

1