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.

About your question, the formulas for kinematics :

$$1) v = u+at$$

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

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

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

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