## Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (3rd Edition)

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: $v = \frac{−50~m}{10~s} = −5.0~m/s$