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Question 30478
JEE Physics · Hard

Work, Power and Energy: Advanced — Bead on Wire MCQ

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Advanced — Bead on WireHardQuestion 30478

Question

A bead slides on a frictionless wire from height h to height 0 (along any shape of wire). Speed at the bottom depends on:
  1. A
    The exact shape of the wire
  2. B
    Only the height difference h
    Correct
  3. C
    The mass of the bead
  4. D
    The length of the wire

Correct answer

Only the height difference h

Explanation

Only gravity (conservative) does work. By conservation of energy: v = √(2gh), independent of path shape or wire length.

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