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Sunday, 16 August 2026
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Physics Past Questions and Answers

Topic: Mass

Jamb Physics Questions - Mass

Question 16:
If relative density of a metal is 19, what will be the mass of 20cm3 of the metal when immersed in water?
  • A 380g
  • B 400g
  • C 360g
  • D 39g
  • E 180g
View Answer & Explanation
Question 17:
A man of mass 50kg ascends a flight of stairs 5m high in 5 seconds. If acceleration due to gravity is 10ms-2, the power expended is
  • A 100W
  • B 200W
  • C 250W
  • D 400W
  • E 500W
View Answer & Explanation
Question 18:
The electrochemical equivalent of a metal is 0.126 x 10-6 kgC-1. The mass of the metal that a current of 5A will deposit from a suitable bath in 1 hour is
  • A 0.0378 x 10 <sup style='font-size: smaller;'>-3</sup>kg
  • B 0.227 x 10 <sup style='font-size: smaller;'>-3</sup>kg
  • C 0.378 x 10 <sup style='font-size: smaller;'>-3</sup>kg
  • D 0.595 x 10 <sup style='font-size: smaller;'>-3</sup>kg
  • E 2.268 x 10 <sup style='font-size: smaller;'>-3</sup>kg
View Answer & Explanation
Question 19:
Which of the following statements are true about the spring balance and the chemical balance? i. both are used to measure the mass of an object. ii. either of them may be used to measure the weight of an object. iii. the spring balance works on the principle of Hooke's law while the chemical balance works on the principle of moments. iv. a change in gravity does the readings of a spring balance but not that of a chemical balance.
  • A I, and iv
  • B Ii and iii
  • C Ii and iv
  • D I, ii and iii
  • E I and iii
View Answer & Explanation
Question 20:
A block of mass 2.04kg resting on a smooth horizontal plane is acted upon simultaneously by two-forces, 10N due North and 10N due East. The magnitude of the acceleration produced by the force on the block is
  • A 0.10ms<sup style='font-size: smaller;'>-2</sup>
  • B 7.07ms<sup style='font-size: smaller;'>-2</sup>
  • C 10.00ms<sup style='font-size: smaller;'>-2</sup>
  • D 14.10ms<sup style='font-size: smaller;'>-2</sup>
  • E 20.00ms<sup style='font-size: smaller;'>-2</sup>
View Answer & Explanation