Physics

Problem

0.10\,\text{kg}

steel ball is initially at rest. A machine exerts a horizontal force that increases uniformly from

0

100\,\text N

0.020\,\text s

and then decreases uniformly back to

0

in the next

0.020\,\text s

. Neglecting friction, what is the speed of the ball immediately after the force returns to zero? a)

40\,\text{m/s}

20\,\text{m/s}

10\,\text{m/s}

30\,\text{m/s}