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Sunday, 16 August 2026
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Physics Past Questions and Answers

Topic: Mass

Jamb Physics Questions - Mass

Question 36:
A body weighing 80N stands in an elevator that is about to move. The force exerted by floor on the body as the elevator moves upward with an acceleration of 5 ms-2 is
[g = 10ms-2]
  • A 40 N
  • B 80 N
  • C 120 N
  • D 160 N
View Answer & Explanation
Question 37:
The percentage of the original nuclei of the sample of a radioactive substance left after 5 half - lives is
  • A 8%
  • B 5%
  • C 3%
  • D 1%
View Answer & Explanation
Question 38:
On top of a spiral spring of the force constant 500Nm-1 is placed a mass of 5 x 10-3 kg. If the spring is compressed downwards by a length of 0.02m and then released, calculate the height to which the mass is projected
  • A 8 m
  • B 4 m
  • C 2 m
  • D 1 m
View Answer & Explanation
Question 39:
On top of a spiral spring of the force constant 500Nm-1 is placed a mass of 5 x 10-3 kg. If the spring is compressed downwards by a length of 0.02m and then released, calculate the height to which the mass is projected
  • A 8 m
  • B 4 m
  • C 2 m
  • D 1 m
View Answer & Explanation
Question 40:
A 90cm uniform lever has a load of 30N suspended at 15cm from one of its ends.

If the fulcrum is at the center of gravity, the force that must be applied at its other end to keep it in horizontal equilibrium is
  • A 15N
  • B 20N
  • C 30N
  • D 60N
View Answer & Explanation