Initial Velocity without acceleration given.

AI Thread Summary
An antelope with constant acceleration covers 74.0 m in 7.70 seconds, reaching a speed of 14.6 m/s at the second point. The discussion focuses on determining the initial speed and acceleration using kinematic equations. Participants suggest using formulas like v = u + at and s = ut + 1/2 at^2 to solve the problem. Clarification is provided that the initial velocity is needed, and one participant finds a solution using a derived formula. The conversation emphasizes understanding kinematic equations for solving motion problems.
c0ld
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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.
 
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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 :smile:
 
What does s mean? Displacement?


First point should be initial velocity. All the formulas you posted require acceleration.
 
Last edited:
Got the problem! It was ((2 * Displacement) / t) - final velocity
 
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