Finding average/final velocity and acceleration.

In summary, we are given an object with an initial velocity of 10.0m/s [S] and it moves 720m in 45s along a straight line with constant acceleration. We need to find the average velocity, final velocity, and acceleration for the 45s interval. The equations used are the 5 kinematic equations. The final and average velocity can be distinguished by knowing that the average velocity is the total displacement divided by total time, while for constant acceleration, it is equal to (vi + vf)/2.
  • #1
HelloImAsh
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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 :)
 
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  • #2
Welcome to PF!

Hi HelloImAsh! Welcome to PF! :smile:

(try using the X2 button just above the Reply box :wink:)
HelloImAsh said:
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.
 

FAQ: Finding average/final velocity and acceleration.

What is the difference between average velocity and final velocity?

Average velocity is the total displacement divided by the total time taken, while final velocity is the velocity at a specific moment in time.

How do you calculate average velocity?

Average velocity is calculated by dividing the total displacement by the total time taken.

What is acceleration and how is it related to velocity?

Acceleration is the rate of change of velocity. It can be calculated by dividing the change in velocity by the change in time. Acceleration is directly related to velocity, as an increase in velocity results in a positive acceleration, while a decrease in velocity results in a negative acceleration.

Can an object have a constant velocity and still have acceleration?

No, an object cannot have a constant velocity and still have acceleration. Acceleration implies a change in velocity, so if the velocity is constant, the acceleration must be zero.

How do you find the final velocity of an object with constant acceleration?

The final velocity of an object with constant acceleration can be calculated using the equation: final velocity = initial velocity + (acceleration x time). This is known as the kinematic equation for final velocity.

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