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Monday, 20 April 2026
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Physics Past Questions and Answers

Topic: Unit of mass

Jamb Physics Questions - Unit of mass

Question 6:
A Uniform beam PQ of mass 20kg and length 5m is balanced as shown above, a man of weight 800N stands at M such that QM = 2m. The reaction at P and Q respectively are(take g = 10ms-2)
  • A 300N and 500N
  • B 420N and 580N
  • C 220N and 380N
  • D 580N and 420N
  • E 382N and 220N
View Answer & Explanation
Question 7:
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 8:
Two strings of the same length and under the same tension gives notes of frequencies in the ratio 4 : 1. The masses of the strings are in the corresponding ratio of
  • A 2 : 1
  • B 1 : 2
  • C 1 : 4
  • D 1 : 16
View Answer & Explanation
Question 9:
An object of mass 400g and density 600kgm-3 is suspended with a sting so that half of it is immersed in paraffin of density 900kgm-3. The tension in the string is
  • A 1.0N
  • B 3.0N
  • C 4.0N
  • D 5.0N
View Answer & Explanation
Question 10:
The mass of a specific gravity bottle is 15.2g when it is empty. it is 24.8g when filled with kerosene and 27.2g when filled with distilled water. Calculate the relative density of kerosene
  • A 1.25
  • B 1.10
  • C 0.90
  • D 0.80
View Answer & Explanation