A block attached to a spring is momentarily at rest at (left of equilibrium) at

PHYSICS · Subjective · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics

Problem

A block attached to a spring is momentarily at rest at

x = -6.0\,\text{cm}

(left of equilibrium) at

t = 0

. Its displacement subsequently obeys

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

. State: (i) the amplitude

A

, and (ii) the phase constant

\phi

(in rad).