The displacement of a particle along a line is cm

MATHEMATICS · Single correct · A Level · Mathematics · Kinematics · Kinematics

Problem

The displacement of a particle along a line is

s(t)=\cos(\pi t)

cm. Which statement about the velocity at

t=1\,\text{s}

is correct? (a)

v(1)>0

(b)

v(1)=0

(c)

v(1)<0

(d)

v(1)

cannot be determined from the given information