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Tuesday, 18 August 2026
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Physics Past Questions and Answers

Topic: Structure of Matter and Kinetic Theory

Jamb Physics Questions - Structure of Matter and Kinetic Theory

Question 81:
A bullet fired at a wooden block of thickness 0.15m manages to penetrate the block. If the mass of the bullet is 0.025kg and the average resisting force of the wood is 7.5 x 103N, calculate the speed of the bullet just before it hits the wooden block.
  • A 450ms<sup style='font-size: smaller;'>-1</sup>
  • B 400ms<sup style='font-size: smaller;'>-1</sup>
  • C 300ms<sup style='font-size: smaller;'>-1</sup>
  • D 250ms<sup style='font-size: smaller;'>-1</sup>
View Answer & Explanation
Question 82:
A gas has a volume of 100cm3 at 27oC. If it is heated to temperature T until a final volume of 120cm3 is attained, calculate T
  • A 33<sup style='font-size: smaller;'>o</sup>C
  • B 60<sup style='font-size: smaller;'>o</sup>C
  • C 87<sup style='font-size: smaller;'>o</sup>C
  • D 114<sup style='font-size: smaller;'>o</sup>C
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Question 83:
One valid assumption of the kinetic theory of gasses is the
  • A The molecules of a gas are constantly in a state of motion and the number of collision remains constant
  • B The number of molecule of gas increases with increasing pressure
  • C As the temperature increases, the number of collision made by the gas molecule remains constant
  • D The molecules of gas are all identical and are very small in size
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Question 84:
A lead bullet of mass 0.05kg is fired with a velocity of 200ms\(^{-1}\) into a lead block of mass 0.95kg. Given that the lead block can move freely, the final kinetic energy after impact is
  • A 50 J
  • B 100 J
  • C 150 J
  • D 200 J
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Question 85:
A solid weigh 10 .00 N in air, 6 N when fully immersed in water and 7 . 0 N when fully immersed in a liquid X. Calculate the relative density of the liquid, X.
  • A 5/3
  • B 4/3
  • C 3/4
  • D 7/10
View Answer & Explanation