A mass on a horizontal spring is released from rest at its maximum positive…

PHYSICS · Single correct · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics

Problem

A mass on a horizontal spring is released from rest at its maximum positive displacement at time

t=0

. Which of the following expressions best represents the displacement as a function of time, where positive

x

is to the right? (a)

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

(b)

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

(c)

x(t)=A\sin(\omega t)

(d)

x(t)=A\cos(\omega t+\tfrac{\pi}{2})