# Homework Help: Initial Velocity without acceleration given.

1. Sep 14, 2009

### c0ld

1. The problem statement, all variables and given/known data
An antelope moving with constant acceleration covers the distance 74.0m between two points in time 7.70s . Its speed as it passes the second point is 14.6 m/s.

2. Relevant equations
What is its speed at the first point?

What is the acceleration?

3. The attempt at a solution

I dont know how to type in the formula in here any help? Im kinda confused on how to substitue the formula.

2. Sep 14, 2009

### songoku

Hi c0ld

To type formula here, we use Latex. I don't know if there is a thread somewhere here about Latex tutorial, maybe you can use google.

$$1) v = u+at$$

$$2) s=ut+\frac{1}{2}at^2$$

$$3) v^2=u^2+2as$$

v = final speed
u = initial speed

Apply those formulas and you'll find the answer

3. Sep 14, 2009

### c0ld

What does s mean? Displacement?

First point should be initial velocity. All the formulas you posted require acceleration.

Last edited: Sep 14, 2009
4. Sep 14, 2009

### c0ld

Got the problem! It was ((2 * Displacement) / t) - final velocity