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JAMB Physics 1995 Question 16

Question 16

Pressure

A hydraulic press has a large circular piston of radius 0.8 m and a circular plunger of radius 0.2 m. A force of 500 N is exerted by the plunger. Find the force exerted on the piston.

  1. A.8000 N
  2. B.4000 N
  3. C.2000 N
  4. D.31 N
Show the answer and explanation

Answer: A (8000 N)

Explanation

Pressure is the same on both: F/(π × 0.82) = 500/(π × 0.22). So F = 500 × 16 = 8000 N.