The force acting on a particle moving along the x-axis is

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

Problem

The force acting on a

1\,\text{kg}

particle moving along the x-axis is

F = 3x^{2}\,\text{N}

, with

x

in metres. Starting from rest at

x = 0

, what is the speed of the particle when it reaches

x = 2\,\text{m}

? (a)

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

(b)

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

(c)

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

(d)

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