A machine whose efficiency is 75% is used to lift a load of 1000N. Calculate the effort put in to the machine if it has a Velocity ratio of 4.

Assessment: JAMB UTME - Physics - 2014 Subject: Physics

Question 1 Report

343.32N

233.33N

333.33N

334.33N

Answer Details

$\frac{M A}{V R} \times \frac{100}{1} = e f f i c i e n c y$

$\frac{L}{E} \frac{1}{V R} \times \frac{100}{1} = 75$

$\frac{1000}{E} \frac{1}{4} \times \frac{100}{1} = 75$

$E = \frac{250 \times 100}{75}$

E = 333.3N

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