A Sprinter Runs 100

Multiple Choice

A sprinter runs 100.0 m. If he travels at constant acceleration of 1.95 m/s² for the first 75.0 m and then at constant velocity for the remaining distance, what was his total elapsed time for the whole race?

A) 11.3 s
B) 9.8 s
C) 10.1 s
D) 10.2 s