Solving Acceleration Problems in a Sports Car Rally: A Guide

[Manbe]

I can't figure this problem out. Any help is greatly appreciated!

At a sports car rally, a car starting from rest accelerates uniformly at a rate of 9.0 m/s2 over a straight-line distance of 100m. The time to beat in this event is 4.5 s. Does the driver do it? If not, what must be the acceleration be to do so?

Thanks very much.

 

[Doc Al]

Welcome to PF!

Why don't you start by telling us what you know about accelerated motion. What have you done so far on the problem?

 

[ExtravagantDreams]

have you learned the kinematic equations?

 

[Physicsisfun2005]

X=(1/2)at^2
......use that equation (thats t squared)

X=distance
a= the accel.
t=time

I'd tell u the answer but what's the fun of not learning anything ;)...to see if he beats it see if he crosses the finish line (100m) in 4.5s with that accel...if he doesn't solve for a.