Kathy Kool buys a sports car that can accelerate at the rate of4.21m/s2. She dec

Question

Kathy Kool buys a sports car that can accelerate at the rate of4.21m/s2. She decides totest the car by racing with another speedster, Stan Speedy. Bothstart from rest, but experienced Stan leaves the starting line .68 s before Kathy. Stan moves with a constant acceleration of3.14 m/s2, and Kathymaintains an acceleration of 4.21m/s2.
(a) Find the time it takes Kathy to overtakeStan.
s
(b) Find the distance she travels before she catches him.
m
(c) Find the speed of stans car
m/s
find kathys speed at that instant
m/s

Explanation / Answer

A) 1/2*4.21*t^2 = 1/2*3.14*(t + 0.68)^2 t = 4.306

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