Physics Waves ETEA 2018
PMDC Verified Question 103 of 125
Which one of the following varies when an object execute simple harmonic motion?
A
Angular frequency
B
Total energy
C
Force
D
Amplitude
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Force
Concept:

Simple Harmonic Motion (SHM) requires a restoring force that is directly proportional to displacement.

Formula:

$$ F = -kx $$

Solution:

  • In ideal SHM, Amplitude and Angular Frequency (\( \omega = \sqrt{k/m} \)) are fundamental constants determined by the system's physical properties.


  • Total energy (\( E = \frac{1}{2}kx_0^2 \)) is conserved and remains perfectly constant throughout the motion.


  • However, the restoring Force continuously changes its magnitude and direction depending on the mass's exact instantaneous position (\( x \)), being maximum at extremes and zero at equilibrium.


Why other options are incorrect:

Options A, B, and D define the rigid, unchanging boundary conditions of ideal simple harmonic motion.

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.

Previous Question All Waves MCQs Next Question

Want to solve full-length papers under timed exam conditions?

Practice with zero-scroll lockdown sprints, dynamic latency zone timers, live peer selection telemetry, and the automated Amber mistake recovery loop.

Enter Arena Sprint iOS App Android App