A particle performs SHM on the x-axis about x=0 with amplitude A and angular frequency ω. At t=0 it is at x=A/2 and moving in +x. If x=A sin(ωt+φ), then φ is:
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A particle performs SHM on the x-axis about x=0 with amplitude A and angular frequency ω. At t=0 it is at x=A/2 and moving in +x. If x=A sin(ωt+φ), then φ is:

G1 Physics · Accepted Answer

At t=0, x=A/2 and v>0. From x=A sin(ωt+φ), sinφ=1/2 and cosφ>0, hence φ=π/6. Correct answer: A.