Physics Rotational & Circular Motion UHS 2024
PMDC Verified Question 14 of 95
In an elastic collision the total kinetic energy
A
Dissipates after collision
B
Increases after the collision
C
Reduces after the collision
D
Before and after collision remains the same
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: Before and after collision remains the same
Concept:

Collisions are categorized by how they handle energy. In all collisions, momentum is conserved. But Kinetic Energy is treated differently.

Solution:

  • By strict physical definition, a perfectly elastic collision is one where 0% of the kinetic energy is converted to heat, sound, or deformation.
  • Therefore, the total kinetic energy of the system strictly remains the same before and after the collision.


Why other options are incorrect:

  • Option A and Option C describe an inelastic collision (like cars crashing and crumpling).
  • Option B would violate the First Law of Thermodynamics (energy cannot be created) unless there was an explosion.

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 Rotational & Circular Motion 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