The position of a particle moving along a line is

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

Problem

s(t)=3t^{3}-5t^{2}+4t+7

, where

s

is measured in meters and

t

in seconds. What is the particle’s velocity at

t=2\text{ s}

? (a)

26\text{ m/s}

(b)

20\text{ m/s}

(c)

-4\text{ m/s}

(d)

18\text{ m/s}