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Finding average/final velocity and acceleration.

  • Thread starter HelloImAsh
  • Start date
  • #1

Homework Statement


An object with an initial velocity of 10.0m/s moves 720m in 45s along a straight line iwht constant acceleration. For the 45s interval, find its average velocity, final velocity and acceleration.


Homework Equations


5 Kinematic equations:
d=1/2(Vf+Vi)t
Vf=Vi+at
d=Vit+1/2at^2
d=Vft-1/2at^2
Vf^2=Vi^2+2ad

I can't seem to distinguish between the final and average velocity. The acceleration part is simple enough. Thanks :)
 

Answers and Replies

  • #2
tiny-tim
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Welcome to PF!

Hi HelloImAsh! Welcome to PF! :smile:

(try using the X2 button just above the Reply box :wink:)
I can't seem to distinguish between the final and average velocity. The acceleration part is simple enough. Thanks :)
average velocity = total displacement divided by total time

(which, for constant acceleration, = (vi + vf)/2)
 
  • #3
Thanks, I got the answer.
 

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