Initial Velocity without acceleration given.

[c0ld]

Homework Statement

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.

Homework Equations

What is its speed at the first point?

What is the acceleration?

The Attempt at a Solution

I don't know how to type in the formula in here any help? I am kinda confused on how to substitue the formula.

 

[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

 

[c0ld]

What does s mean? Displacement?


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

 

[c0ld]

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