Physics

Problem

A box of mass

2\,\text{kg}

is initially moving on a smooth horizontal surface with a speed of

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

. A constant horizontal force of

10\,\text{N}

acts on the box in the direction of motion for a distance of

4\,\text{m}

. Calculate the final speed of the box after it has travelled the given distance.