(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

I took this right out of the text, it is not home work just me trying to get better.

The acceleration of a particle is defined by the relation a = -8 m/s^2

Knowing that x = 20 m when t= 4 m, and that x = 4 m when v = 16 m/s

(a) determine the time when velocity is zero and (b) the velocity and total distance travelled when t = 11 s

2. Relevant equations

3. The attempt at a solution

My attempt is I know velocity must be the integration of acceleration and displacement the integration of velocity. So I attempted to integrate -8dt 2 times. but when I do that I get x=-4t^2 which does not fit my given when t=4, x=20

Any help would be greatly appreciated, even just pointing me in the right direction

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Vector dynamics question starting from accelaration

**Physics Forums | Science Articles, Homework Help, Discussion**