Physics

Problem

A body oscillates along a straight line according to

x(t)=A\cos(\omega t+\phi)

with

\omega=5\,\text{rad s}^{-1}

. At

t=0

, its displacement is

2.0\,\text{cm}

and its velocity is

+6.0\,\text{cm s}^{-1}

. a. Determine the amplitude

A

of the motion. b. Calculate its acceleration when the displacement is

x=-1.0\,\text{cm}