average speed=100/9.58=10.43 m/s
that is the max velocity for the sprinter.
now the question is asking accleration up to a constant rattte NO MATTER how long it is.
Vf^2=Vi^2+2ad
10.43^2=0 + 2 a 100
a= you do it. This acceleration is for the entire 100m run. The question is flawed in this, as there can be any initial acceleration greater than this to reach max velocity. Lousy ill-conceived question.
(a)The world record for the 100-meter dash is 9.58 seconds (Bolt, 2009). Use the speed from part (a)
as his maximum velocity. Assume a sprinter accelerates at a constant rate up to their maximum
velocity, which is maintained for the remainder of the race, no matter how long it is. What is the
duration of the acceleration period at the beginning of the race?
(B)Also Determine the initial average acceleration in part(a)
2 answers
in your problem statement, the sprinter could achieve his max velocity in a fraction of a second or it could take to the finish line
2 answers