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January 28, 2015

January 28, 2015

Posted by **sarah** on Monday, September 11, 2006 at 4:26pm.

a) what is the car's constant deceleration before the impact?

b)How fast is the car traveling at impact?

I don't get the impact parts...

I'm not entirely sure either. I can see that the average velocity v_avg=s/t or 24m/2sec

Is there some formula for average velocity in your text?

I think you have to use one of these formulas:

v=v0+at

x-x0=v0t+1/2at^2

v^2-v0^2=2a(x-x0)

x-x0=(v0+v)/2 *t

x-x0=vt-1/2 at^2

But I'm not sure if these are correct...

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