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Q1 (CISF/2026) Science & Technology › Basic Science (Physics, Chemistry, Biology)

A fast-moving carrom striker displaces only the bottom carrom coin from the carrom coin pile. Which one among the following phenomena gives the correct explanation of this effect ?

Result
Your answer: —  Â·  Correct: A

Explanation

The phenomenon is explained by Newton's First Law of Motion, also known as the Law of Inertia. This law states that an object at rest stays at rest, and an object in motion stays in motion unless acted upon by an external force.

  • When a fast-moving striker hits the bottom coin, it applies a sudden horizontal force specifically to that coin.
  • The coins above it possess inertia of rest, meaning they tend to maintain their state of rest.
  • Because the contact time is very short and the force is localized, the upper coins do not acquire horizontal velocity; instead, they drop vertically due to gravity once the bottom support is removed.

Option B (Newton's Third Law) describes action-reaction pairs but does not explain why the upper pile remains stationary. Options C and D are unrelated to classical mechanics of solid bodies in this context.

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