I was doing this problem, and now I wonder where I went wrong(adsbygoogle = window.adsbygoogle || []).push({});

The problem states

A ball starts from rest and rolls down a hill iwth uniform acceleration, traveling 150m during the second 5.0s of its motion. How far did it roll during the first 5.0s of motion.

This is what I did

x = 150m

t = 5.0s

with that data I got the velocity for stage 2

v = 30m/s

with that I tried to determine the acceleration so

V = Vo + at

30m/s = 0m/s + a(10s);

I got a = 3m/s

then I tried getting the x with

X = Xo + Vot + 1/2(a*t^2);

X = 0 + 0 + 1/2(3m/s*(5^2));

and I got X to be 37.5m but the book says the answer is 50m where did I go wrong?

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# Homework Help: Help with problem

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