A particle of mass

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

A particle of mass

2\,\text{kg}

, initially at rest, is subjected to a force that varies with time as

F = 6t^{2}\,\text{N}

for

0 \le t \le 2\,\text{s}

, after which the force becomes zero. What is the speed of the particle at

t = 2\,\text{s}

? (a)

6\,\text{m\,s}^{-1}

(b)

8\,\text{m\,s}^{-1}

(c)

12\,\text{m\,s}^{-1}

(d)

4\,\text{m\,s}^{-1}