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Initial Velocity without acceleration given.

by c0ld
Tags: acceleration, initial, velocity
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Sep14-09, 12:00 AM
P: 5
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.
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Sep14-09, 12:38 AM
P: 770
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 :

[tex]1) v = u+at[/tex]

[tex]2) s=ut+\frac{1}{2}at^2[/tex]

[tex]3) v^2=u^2+2as[/tex]

v = final speed
u = initial speed

Apply those formulas and you'll find the answer
Sep14-09, 01:02 AM
P: 5
What does s mean? Displacement?

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

Sep14-09, 01:29 AM
P: 5
Initial Velocity without acceleration given.

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

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