A Sprinter Runs 100

Multiple Choice

A sprinter runs 100.0 m in 12.2 seconds. If he travels at constant acceleration for the first 50.0 m and then at constant velocity for the final 50.0 m, what was his peak speed?

A) 12.3 m/s
B) 17.5 m/s
C) 8.20 m/s
D) 4.10 m/s