Physics

Problem

0.50\,\text{kg}

hockey puck initially at rest experiences a force

F(t)=10\sin\!\left(\dfrac{\pi t}{0.20}\right)

N for

0\le t\le 0.20\,\text{s}

and no force afterwards. What is the puck’s speed just after

t=0.20\,\text{s}

? a)

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

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

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

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