# Homework: Acceleration of a rocket along a track

1. Aug 18, 2007

### kring_c14

1. The problem statement, all variables and given/known data

th rocket driven sled sonic wind no. 2 used for investigating the physiological effects of large accelerations, runs on a straight, level track 1070m long. Starting from rest. it can reach a speed of 224m/s in 0.900s

compute for its acceleration assuming that it is constant

2. Relevant equations
im confused which equations do i have to use
is it
Vf=V+at
Vf2]=V2+2ax or
x=Vt+1/2at2

my v=0, Vf=224m/s, t=.900s, x=1070
is this correct?

2. Aug 18, 2007

### Archduke

Even more simple than that. What is acceleration? It's the rate of change of velocity with respect to time. So, mathematically:

$$a=\frac{\Delta v}{\Delta t}$$

So, average acceleration is the change in velcity divided by the change in time (which is just another way of writing the first equation you wrote)