by the mass sideways, a=2.0cm
Angular frequency of oscillation:
(a) As time is noted from the mean position, hence using
x=asinωt we hav x=2sin20t
(b) At maximum stretched position, the body is at the extreme right position, with an intial phase of π/2 rad. Then,
(c) At maximum compressed position, the body is at left position, with an intial phase of 3π/2rad. Then,
The functions neither differ in amplitude nor in frequency. They differ in intial phase.