Physics

Problem

0.50\,\text{kg}

particle moves along a frictionless line under a position-dependent force

F = 10 - 2x

(in

\text{N}

), where

x

is in metres. Its speed at

x = 0

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

. Determine its speed when it reaches

x = 4\,\text{m}

. a)

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

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

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

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