physics question
one simple model for a person running the 100m dash is to assume the sprinter runs with constant acceleration unit reaching top speed then maintains the speed through the finish line
If a sprinter reaches his top speed of 11.4m/s in 2.44s what will be his total time?|||He reached 11.4m/s in 2.44s with a constant acceleration, so the acceleration was 11.4/2.44 = 4.67 m/s^2.
The distance he covered in those 2.44s is 1/2at^2 = 1/2(4.67)(2.44)^2 = 13.9m. That leaves him 86.1m to cover at 11.4m/s, which is a time of 7.55s. So his total time is 7.55 + 2.44 = 9.99s.
Not exactly a world class sprint time.
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment