Physics

Physics

Problem

A

1\,\text{kg}

particle moves along the

x

-axis under a variable force

F(x) = 2x\,\text{N}

, where

x

is in metres. If its speed at

x = 0

is

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

, what is its speed when it reaches

x = 3\,\text{m}

? a)

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

b)

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

c)

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

d)

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

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