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Sunday, 16 August 2026
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Physics Past Questions and Answers

Topic: Simple Machines

Jamb Physics Questions - Simple Machines

Question 21:
If a heavy barrel is rolled up a plane inclined at 30° to the horizontal. its velocity ratio will be
  • A 3.0
  • B 3.1
  • C 3.2
  • D 2.0
View Answer & Explanation
Question 22:
A machine of velocity ratio 6 requires an effort of 400 N to raise a load of 800 N through I m. Find the efficiency of the machine
  • A 55. 6 %
  • B 50.0%
  • C 33.3%
  • D 22.2%
View Answer & Explanation
Question 23:
A machine of velocity ratio 6 requires an effort of 400 N to raise a load of 800 N through I m. Find the efficiency of the machine
  • A 55. 6 %
  • B 50.0%
  • C 33.3%
  • D 22.2%
View Answer & Explanation
Question 24:
The velocity ratio of a machine is 5 and its efficiency is 75%. What effort would be needed to lift a load of 150N with the machine?
  • A 20N
  • B 30N
  • C 40N
  • D 50N
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Question 25:
A wheel and axle is used to raise a load of 500 N by the application of an effort of 250 N. If the radii of the wheel and the axle are 0.4 cm and 0.1 cm respectively, the efficiency of the machine is
  • A 20 %
  • B 40 %
  • C 50 %
  • D 60 %
View Answer & Explanation