Question
Suppose the sprinter continues to run at 6m/s until the end pf the race. After crossing the finish line the sprinter decelerates at 2m/s^2.a) how long it takes her to stop b) how far does the sprinter travel while stopping?
Answers
vf^2=vi^2+2ad
0=6^2+2*(-2)d
solve for distance d.
how long?
avg speed * time= distance
3 m/s * time=d
time= d/3
0=6^2+2*(-2)d
solve for distance d.
how long?
avg speed * time= distance
3 m/s * time=d
time= d/3
Reason for 3 m/s
average speed = (6+0)/2
which is 3
Related Questions
A sprinter accelerates at 4 m/s2 for 3 seconds, and then runs the rest of the race at a constant spe...
1. A sprinter finishes the race with a velocity of 8.9 m/s. the sprinter accelerated to a stop at a...
A sprinter accelerates at the start of the race at 8.5 m/s^2. After 1.3 seconds the sprinter runs th...
Calculate at the start of a race the net force on a sprinter is 640 N. if the mass of the sprinter i...