The radius of a wheel is 30.0 cm and that of its axle is 6.0cm….

The radius of a wheel is 30.0 cm and that of its axle is 6.0cm. Calculate the effort required to lift a load of 120.0N using this machine. Assuming 100% efficiency

Correct Answer: Option C

Explanation

V.R = (frac{R}{r} = frac{30}{6} = 5)
(gamma = frac{M.A}{V.R} times frac{100}{1} )
M.A = (frac{100 times 5}{100} = 5)
Effort = (frac{L}{M.A} = frac{120}{5})
= 24N