A plane inclined at 30^o to the horizontal has an efficiency of 50%. Calculate the force parallel to the plane required to push a load of 120N uniformly upon the plane

50.0N

120.0N

200.0N

240N

Correct answer is B

V.R = $\frac{1}{sin\theta} = \frac{1}{sin 30} = 2$

M.A = $\frac{E \times V.R}{100} = \frac{50 \times 2}{100} = 1$

Effort = $\frac{load}{M.A} = \frac{120}{1} = 120N$

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A plane inclined at 30^o to the horizontal has an efficiency of 50%. Calculate the force parallel to the plane required to push a load of 120N uniformly upon the plane

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