A particle moves on the X-axis according to the equation x = A + B sin ωt. The motion is simple harmonic with amplitude
(a) A
(b) B
(c) A + B
(d) A 2 + B 2 .

(b) B

 At t = 0,
 Displacement x0 is given by,   
 x0 = A + sin ω(0) = A

 Displacement x will be maximum when sinωt is 1
 or,
 xm = A + B

Amplitude will be:
xm - xo = A + B - A = B

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