Physics (College)
posted by Set8 .
One simple model for a person running the 100 m dash is to assume the sprinter runs with constant acceleration until reaching top speed, then maintains that speed through the finish line.
If a sprinter reaches his top speed of 10.8 m/s in 2.54 s, what will be his total time?

While accelerating, he runs 5.4*2.54 = 13.72 meters. (The average speed is half the maximum).
That leaves 86.28 m still to be run at 10.8 m/s. That will take 10.8/10.8 = 7.99 s.
The total time for the 100 meters is
7.99 + 2.54 = 10.53 s
Respond to this Question
Similar Questions

Physics
A sprinter starts from rest and reaches his top speed in 4 seconds running with a constant acceleration. He then maintains that top speed and finishes the 100 m in the overall time of 10 seconds. What is his acceleration? 
physics
A sprinter can reach a speed of 12 m/s in 0.96 s. If the sprinter’s acceleration is constant during that time, what is the sprinter’s acceleration? 
Physics
A sprinter can accelerate with constant acceleration for 2.70 s before reaching top speed. He can run the 100meter dash in 10 s. What is his speed as he crosses the finish line? 
physics
A sprinter mass 72 kg runs the 50 meter dash in 8.35 s. Assume that the sprinter accelerates in the first second and runs the rest of the race at a constant velocity. (a) Calculate the average power produced for that first second. … 
science
A simple model for a person running a 100m race is to assume the sprinter runs with constant acceleration until reaching top speed, and then maintains that speed through the finish line. If a sprinter reaches their top speed of 11.2ms1 … 
college physics
A sprinter can reach a speed of 9.0 m/s in 1.0 s. If the sprinter’s acceleration is constant during that time, what is the sprinter’s acceleration? 
physics
A sprinter can accelerate with constant acceleration for 2.10s before reaching top speed. He can run the 100meter dash in 10 s. What is his speed as he crosses the finish line? 
Physics
The best sprinters can run a 100 m in 10.0 s. A 77.2 kg sprinter accelerates uniformly for the first 51.0 m to reach top speed, which he maintains for the remaining 49.0 m. What is the average horizontal component of force exerted … 
physics
One simple model for a person running the 100m dash is to assume the sprinter runs with constant acceleration until reaching top speed,then maintains that seed through the finish line.if sprinter reaches his top speed of 11.1m/s in … 
Physics
A sprinter accelerates at the start of the race at 8.5 m/s^2. After 1.3 seconds the sprinter runs the rest of the 100m race at a constant velocity. What was the sprinter's time at the finish line?