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Monday, 20 April 2026
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Physics Past Questions and Answers

Topic: Motion under gravity

Jamb Physics Questions - Motion under gravity

Question 1:
A body is released from rest and allowed to fall freely from a given height under gravity. The kinetic energy at its half-way point is
  • A A little above half of its initial energy
  • B A little below half of its initial energy
  • C A half of its initioal energy
  • D A little above its initial energy
  • E A little below its initial energy
View Answer & Explanation
Question 2:
A body falls freely under gravity (g = 9.8ms-2) from a height of 40m on to the top of a platform 0.8m above the ground. Its velocity on reaching the platform is
  • A 784ms<sup style='font-size: smaller;'>-1</sup>
  • B 80ms<sup style='font-size: smaller;'>-1</sup>
  • C 78.4ms<sup style='font-size: smaller;'>-1</sup>
  • D 39.2ms<sup style='font-size: smaller;'>-1</sup>
  • E 27.7ms<sup style='font-size: smaller;'>-1</sup>
View Answer & Explanation
Question 3:
A binary operation \(\otimes\) defined on the set of integers is such that m \(\otimes\) n = m + n + mn for all integers m and n. Find the inverse of -5 under this operation, if the identity element is 0
  • A \(\frac{-5}{4}\)
  • B \(\frac{-5}{6}\)
  • C O
  • D 5
View Answer & Explanation
Question 4:
An object is weighted at different locations on the earth. What will be the right observation?
  • A Both the mass and weight are constant
  • B Both the mass and weight vary
  • C The mass is constant while the weight varies
  • D The weight is constant while the mass varies
View Answer & Explanation
Question 5:
If it takes an object 3s to fall freely to the ground from a certain height, what is the distance covered by the object?
  • A 90 m
  • B 30 m
  • C 45 m
  • D 60 m
View Answer & Explanation