(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A young woman named Kathy Kool buys a

sports car that can accelerate at the rate of

4.56 m/s2. She decides to test the car by drag

racing with another speedster, Stan Speedy.

Both start from rest, but experienced Stan

leaves the starting line 0.51 s before Kathy.

Stan moves with a constant acceleration of

3.43 m/s2 and Kathy maintains an accelera-

tion of 4.56 m/s2.

Find the time it takes Kathy to overtake

Stan. Answer in units of s.

The formulas are:

vf = vi + at

d = vit + 1/2at^2

vf^2 = vi^2 + 2ad

d = 1/2 (vi + vf) delta t

a = delta v/ t

v = d/t

KEY:

v: m/s

d: m

t: s

a: m/s^2

vi: initial velocity

vf: finial velocity

delta v: change in velocity

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# Homework Help: Kathy Kool needs some help

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