Physics Waves UHS 2022
PMDC Verified Question 60 of 125
When will the oscillations stop in the absence of resistive forces?
A
Never
B
After 10 minutes
C
In 10 minutes
D
Immediately
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Never
Concept:

Oscillations naturally decay (dampen) solely because energy is lost from the system to the environment (usually as heat) via resistive forces like friction or air drag.

Solution:

  • If a system operates in a hypothetical perfect vacuum with zero friction and absolute "absence of resistive forces," no energy is ever lost.


  • According to the law of conservation of energy, the kinetic and potential energies will perfectly exchange forever.


  • Consequently, the theoretical oscillations will never stop.


Why other options are incorrect:

Any time-bound cessation (10 minutes, immediately) inherently requires a mechanism of energy dissipation (damping).

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