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Question 31119
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Simple Harmonic Motion: Displacement Equation MCQ

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Displacement EquationHardQuestion 31119

Question

A particle starts from mean position (x = 0) moving in positive direction. Displacement equation is:
  1. A
    x = A cos(ωt)
  2. B
    x = A sin(ωt)
    Correct
  3. C
    x = A cos(ωt + π/2)
  4. D
    x = −A sin(ωt)

Correct answer

x = A sin(ωt)

Explanation

At t = 0: x = 0 (mean position). So x = A sin(ωt) (starts at 0, moves positive). x = A cos(ωt) would start at x = A.

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