Physics

Problem

1.5\,\text{kg}

puck on nearly frictionless ice experiences a horizontal force described by

F(t)=6-2t

(in newtons) for

0\le t\le 3\,\text{s}

and zero afterward. The puck is initially at rest. What is its speed immediately after

t=3\,\text{s}

? a)

9\,\text{m}\!/\!\text{s}

3\,\text{m}\!/\!\text{s}

6\,\text{m}\!/\!\text{s}

4.5\,\text{m}\!/\!\text{s}