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Monday, 15 June 2026
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Physics Past Questions and Answers

Topic: Dimensions

Jamb Physics Questions - Dimensions

Question 21:
A rope is being used to pull a mass of 10kg vertically upward. Determine the tension in the rope if, starting from rest, the mass acquires a velocity of 4ms\(^{-1}\) in 8s [g = 10ms\(^{-2}\)]
  • A 5N
  • B 50N
  • C 95N
  • D 105N
View Answer & Explanation
Question 22:
I. Temperature.
II. Density of air molecules
III. Pressure
IV. Pitch
Which of the above will affect the velocity of sound in the air
  • A I and II only
  • B II and IV only
  • C I,II and IV only
  • D I,II,III nad IV
View Answer & Explanation
Question 23:
A force of 100N was used to kick a football of mass 0.8kg. Find the velocity with which the ball moves if it takes 0.8s to be kicked
  • A \(32ms^{-1} \)
  • B \(50ms^{-1} \)
  • C \(64ms^{-1} \)
  • D \(100ms^{-1} \)
View Answer & Explanation
Question 24:
The correct unit of energy density is?
  • A Kg m<sup style='font-size: smaller;'>3</sup> s<sup style='font-size: smaller;'>-2</sup>
  • B Kg m<sup style='font-size: smaller;'>2</sup> s<sup style='font-size: smaller;'>-2</sup>
  • C Kg m<sup style='font-size: smaller;'>-3</sup> s<sup style='font-size: smaller;'>-2</sup>
  • D Kg m<sup style='font-size: smaller;'>-1</sup> s<sup style='font-size: smaller;'>-2</sup>
View Answer & Explanation
Question 25:
The fundamental frequency of a plucked wire under a tension of 400N is 250Hz. When the frequency is changed to 500 Hz at constant length, the tension is
  • A 1600N
  • B 400N
  • C 160N
  • D 40N
View Answer & Explanation