A particle executing simple harmonic motion along y axis .its motion is described by the equation y=Asinwt+B.the amplitude of the shm is
y=Asinwt+B
y−B=Asinwt
y−B=0,y=B∴onlymeanpositionshiftsbutamplituderemainsthesame.
whereBisthemeanpositionaboutwhichitperformSHM,
∴amplitude=A