How can you find displacement given initial position, velocity, and time?

  • Thread starter csingham
  • Start date
  • Tags
    Position
In summary, the conversation discusses finding the position (x) given initial velocity (vi), acceleration, and time. The formula x= xi+vt+1/2vt2 is mentioned, but it is noted that it only applies to constant acceleration. The correct equation for displacement from velocity is needed. The conversation ends with the individual finding the solution and thanking the forum.
  • #1
csingham
3
0

Homework Statement


physicscut.jpg

xi=2.0
ti=0

i know the acceleration is -2.0 @ t=3 using the change v/ change t (rise over run)
the vx@ t=3 is two
and t=3
so i need to find the position of x
so i pluged in the formula x= xi+vt+1/2vt2 and I get 11..but I'm way off

Homework Equations



see above

The Attempt at a Solution



tried a few times working from going from the initial x all the way and I get 11 again.

Am I not entering in the sig figs right or am i way off?

I just found this forum and love it!
 
Physics news on Phys.org
  • #2
That equation is for constant acceleration only.
The acceleration changes in this problem, so that equation will not work.

How do you get displacement from velocity in general?
 
  • #3
Redbelly98 said:
That equation is for constant acceleration only.
The acceleration changes in this problem, so that equation will not work.

How do you get displacement from velocity in general?


i figured it out
I wasn't using the right vi

got me on the right path thanks!
 

1. What is the equation for position given ax, vx, and t?

The equation for position given ax, vx, and t is x = x0 + v0t + 1/2at^2, where x is the final position, x0 is the initial position, v0 is the initial velocity, a is the acceleration, and t is the time.

2. How do you find the final position using ax, vx, and t?

To find the final position, you can use the equation x = x0 + v0t + 1/2at^2. Plug in the values for x0, v0, a, and t to solve for x.

3. Can you use this equation to find the position at any time?

Yes, this equation can be used to find the position at any time as long as you have values for ax, vx, and t. It is a commonly used equation in physics to calculate the position of an object in motion.

4. What units are used for position, velocity, acceleration, and time?

Position is usually measured in meters (m), velocity in meters per second (m/s), acceleration in meters per second squared (m/s^2), and time in seconds (s).

5. How does acceleration affect the position of an object?

Acceleration affects the position of an object by changing its velocity. If an object is accelerating, its velocity is changing, which means its position is also changing. The greater the acceleration, the more the position will change in a given amount of time.

Similar threads

  • Introductory Physics Homework Help
Replies
11
Views
913
  • Introductory Physics Homework Help
Replies
13
Views
1K
  • Introductory Physics Homework Help
Replies
5
Views
806
  • Introductory Physics Homework Help
Replies
2
Views
861
  • Introductory Physics Homework Help
Replies
14
Views
896
  • Introductory Physics Homework Help
Replies
9
Views
4K
  • Introductory Physics Homework Help
Replies
3
Views
696
  • Introductory Physics Homework Help
Replies
10
Views
863
  • Introductory Physics Homework Help
Replies
4
Views
2K
  • Introductory Physics Homework Help
Replies
5
Views
974
Back
Top