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JAMB Physics 2004 Question 11

Question 11

Simple Machines

A machine whose efficiency is 60% has a velocity ratio of 5. If a force of 500N is applied to lift a load P, what is the magnitude of P?

  1. A.750N
  2. B.4166N
  3. C.500N
  4. D.1500N
Show the answer and explanation

Answer: D (1500N)

Explanation

MA = efficiency × VR = 0.6 × 5 = 3, so P = 3 × 500 = 1500 N.