The Difference Between Equation Uniform Acceleration and Average elocity

  • Thread starter Arooj
  • Start date
  • #1
40
0

Homework Statement



I was just wondering in what instances you would use the two equation belows, and what the difference is between them.

Homework Equations



average velocity:

vave = Δx/Δt


Uniform Acceleration:

vave = (vi+ vf )/2


The Attempt at a Solution


I'm assuming that the second equation is just a way of finding the average velocity of time and distance are not known.
 

Answers and Replies

  • #2
256
0
vave?
 
  • #3
SammyS
Staff Emeritus
Science Advisor
Homework Helper
Gold Member
11,347
1,022

Homework Statement



I was just wondering in what instances you would use the two equations below, and what the difference is between them.

Homework Equations



average velocity:

vave = Δx/Δt


Uniform Acceleration:

vave = (vi+ vf )/2

The Attempt at a Solution


I'm assuming that the second equation is just a way of finding the average velocity of time and distance are not known.
The first equation, [itex]\displaystyle v_\text{ave}=\frac{\Delta x}{\Delta t}[/itex] is a definition for average velocity, so it's always true.

The second equation, [itex]\displaystyle v_\text{ave}=\frac{v_\text{initial}+v_\text{final}}{2}[/itex] is true for the case of uniform (constant) acceleration. It's not true in general, if the acceleration is not constant.
 

Related Threads on The Difference Between Equation Uniform Acceleration and Average elocity

Replies
2
Views
6K
  • Last Post
Replies
1
Views
3K
Replies
12
Views
8K
Replies
6
Views
7K
Replies
4
Views
2K
Replies
12
Views
16K
Replies
6
Views
4K
Top