Physics

Problem

1.2\,\text{kg}

lab cart receives a

4.0\,\text{N}

horizontal push over a

0.60\,\text{m}

distance on a level track and then coasts with negligible friction for

1.5\,\text{m}

. It subsequently enters a rough section where a constant

0.80\,\text{N}

kinetic friction force acts over the next

0.80\,\text{m}

. Determine the speed of the cart as it leaves the rough section.