Physics Work & Energy NUMS 2023
PMDC Verified Question 35 of 108
An object has 1J of P.E. what is the work done in term of height?
A
10J
B
0J
C
0.1J
D
1J
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: 1J
Concept:

Energy is fundamentally defined as the capacity to do work.

Formula:

$$ W = \Delta P.E $$

Solution:

  • If a body has 1 Joule of Gravitational Potential Energy, it means exactly 1 Joule of work was done to lift it to that height.


  • Conversely, if released, it has the capacity to do exactly 1 Joule of work as it falls back to the reference level.


  • Therefore, the work equivalence is directly 1 J.


Why other options are incorrect:

Assuming the mass is 1 kg and gravity is 10 m/s² might trick someone into calculating height (h = 0.1m) and picking 0.1J, but the question asks for work done, which matches the energy perfectly.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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