Answer
At t = 10 s:
v = 1.25 m/s
At t = 25 s:
v = 0
At t = 35 s:
v = −5.0 m/s
Work Step by Step
The velocity is the slope of the position versus time graph.
At t = 10 s:
$v = \frac{25 ~m}{20 ~s} = 1.25 ~m/s$
At t = 25 s:
v = 0
At t = 35 s:
$v = \frac{−50~m}{10~s} = −5.0~m/s$
