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PHYSICS

JAMB 2002 - Question 6

Physics 2002 JAMB Past Questions - Question 6: A. wheel and axle is used to raise a load of 500 N by the application of an effort of 250N. If the radii of the wheel and the axle are 0.4cm and 0.1 cm respectively, the efficiency of the machine is

Choose the correct answers from the options given.

A. wheel and axle is used to raise a load of 500 N by the application of an effort of 250N. If the radii of the wheel and the axle are 0.4cm and 0.1 cm respectively, the efficiency of the machine is

A: 60%

B: 50%

C: 40%

D: 20%

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Correct Answer

Explanation

Efficiency = M.A/V.R X 100/1 M.A = Load/Effort = 500/250 = 2
V.R. = radius of wheel/radius of axle = 0.4/0.1 = 4.
therefore Efficiency = 2/4 x 100/1 = 50 %