Recent content by chaos17

can anyone help for part b?

I would them use avg acceleration= change in velocity / time. Now that I think of it, wouldn't part a be: u=0, t=18.5, x=400 x=ut+0.5at^2 so 400=0.5 * a * (18.5^2) a=400/171.125 a=2.34m^-2 I think that is right. But them what do I do for part b.

what i mean by part a being right is that do i then use v to work out acceleration? Or is this a wrong way?

Homework Statement In a road test,a car was uniformly accelerated from rest over a distance of 400m in 18.5s. The driver then applied the brakes, stopping the car in 4.9 s with constant deceleration. a) calculate the acceleration of the car for the first 400m. b)Calculate the average...