Race to the Finish: Ed vs Harry

[lostfan176]

Homework Statement

Ed, the leading runner in a race taking place along a straight track, is traveling at his top speed, a constant 10.0 m/s. He has been 4.1 m in front of Harry, his chief rival, for the last 10.0 s. But aware that Ed will hit the finish line in 15.0 s, Harry puts on a burst of speed. At what minimum constant rate must he accelerate if he's not to lose the race?

Homework Equations

kinetics

The Attempt at a Solution

i tried most of them 154.1/15 154.1/.41



wats the setup?

 

[hage567]

i tried most of them 154.1/15 154.1/.41

What is this? That surely isn't "most of them"! Where did the 154.1 come from? Explain your reasoning. Make a list of what info you need to find and what you already have.

 

[lostfan176]

150+4.1 cause ed finishes the race in 15 and goin at 10 m/s its 150 m away
and harry is 4.1 m behind so that's how i got 154.1

 

[lostfan176]

nvm
154.1 = 0 + 10(15) + 1/2x(15^2)

x = .036