A particle starts from P at distance A/2 from mean position O and moves left. If its SHM has period T and amplitude A, the equation of motion is:

Question

G1 Physics · Accepted Answer

At t=0, x=A/2 and the particle moves left, so in x=A sin(2πt/T+φ), sinφ=1/2 with cosφ<0; hence φ=5π/6. Thus option B is correct. Since sin(θ+5π/6)=cos(θ+π/3), option D is exactly the same motion. Correct answers: B and D.