Physics Work & Energy SZABMU 2023
PMDC Verified Question 24 of 108
According to work energy principle in linear motion, the work done on the body is equal to:
A
Change in P.E
B
Sum of P.E + K.E
C
Change of K.E
D
Zero
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Change of K.E
Concept:

The standard Work-Energy Theorem states that the net work done by all forces on an object equals the change in its kinetic energy.

Formula:

$$ W_{\text{net}} = \Delta K.E = K.E_f - K.E_i $$

Solution:

  • If a net force acts on a body in linear motion, it accelerates, changing its velocity.


  • This change in velocity directly translates to a change in kinetic energy.


  • Hence, Net Work = Change in K.E.


Why other options are incorrect:

Work done against gravity specifically equals the change in P.E, but the generalized Work-Energy principle for linear motion explicitly defines it via K.E.

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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