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Question 30229
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Laws of Motion and Friction: Inclined Plane — Smooth MCQ

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Inclined Plane — SmoothMediumQuestion 30229

Question

A block slides down a smooth incline of height h from rest. The speed at the bottom (using energy or kinematics with a = g sinθ) is:
  1. A
    √(gh)
  2. B
    √(2gh)
    Correct
  3. C
    2gh
  4. D
    gh

Correct answer

√(2gh)

Explanation

Using energy conservation: ½mv² = mgh → v = √(2gh). (Or: a = g sinθ, distance = h/sinθ, v² = 2a×d = 2gh.)

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