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Question 30574
JEE Physics · Hard

Center of Mass, Momentum and Collision: Advanced — Rebound on Incline MCQ

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Advanced — Rebound on InclineHardQuestion 30574

Question

A ball dropped from rest at height h onto an incline (angle 45°) with e = 1 (elastic). After bouncing, it moves:
  1. A
    Vertically upward
  2. B
    Horizontally
    Correct
  3. C
    At 90° to the incline
  4. D
    Vertically downward

Correct answer

Horizontally

Explanation

For e = 1 elastic bounce off 45° incline: the velocity component perpendicular to incline reverses, parallel component unchanged. A vertical downward velocity reflects to horizontal direction at 45° incline.

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