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Sunday, 16 August 2026
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Physics Past Questions and Answers

Topic: Distinction between mass and weight; escape velocity

Jamb Physics Questions - Distinction between mass and weight; escape velocity

Question 1:
A body is projected from the earth's surface with the intention of letting it escape from the earth's gravitational field. What is the minimum escape velocity of the body? [Earth's radius = 6.4 x 103km, g = 10ms-2]
  • A 14 kms<sup style='font-size: smaller;'>-1</sup>
  • B 13 kms<sup style='font-size: smaller;'>-1</sup>
  • C 12 kms<sup style='font-size: smaller;'>-1</sup>
  • D 11 kms<sup style='font-size: smaller;'>-1</sup>
View Answer & Explanation
Question 2:
The earth is four times the size of the moon and the acceleration due to gravity on the earth is 80 times that on the moon. The ratio of the mass of the moon to that of the earth is
  • A 1:80
  • B 1:320
  • C 1:1280
  • D 1:4
View Answer & Explanation