Physics Work & Energy NUMS 2022
PMDC Verified Question 61 of 108
The amount of work done is moving a body at certain point in a gravitational field to a position of zero potential such that the body is never accelerated is called:
A
Kinetic energy
B
Potential energy
C
Gravitational potential energy
D
Absolute potential energy
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Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: Absolute potential energy
Concept:

This is the formal definition of Absolute Gravitational Potential Energy.

Formula:

$$ U = -\frac{GMm}{r} $$

Solution:

  • "Gravitational potential energy" usually refers to relative changes (\( mgh \)) near the Earth's surface.


  • When moving a mass from a specific point all the way to infinity (where the gravitational field is strictly zero), the total work done without inducing acceleration defines the "Absolute" potential energy at that specific point.


Why other options are incorrect:

Kinetic energy relates to motion. Standard potential energy is relative (depends on an arbitrary reference frame like the floor or ground).

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