Uniform Circular motion - PowerPoint PPT Presentation

1 / 4
About This Presentation
Title:

Uniform Circular motion

Description:

What is the physical meaning of the formula? What happens if the initial speed v of the ... What is the physical meaning of the formula? (4) What happens if the string suddenly ... – PowerPoint PPT presentation

Number of Views:21
Avg rating:3.0/5.0
Slides: 5
Provided by: kkw2
Category:

less

Transcript and Presenter's Notes

Title: Uniform Circular motion


1
Uniform Circular motion
Uniform circular motion in a horizontal plane
2
Uniform Circular motion
Uniform circular motion in a horizontal plane
N mg
r
m
Net force T
F ma T m (v2 / r)
M
Or T m r w2
In this case, T Mg as it is at rest. ? ? ? Mg
m r w2 m v2 / r
3
Uniform Circular motion
Uniform circular motion in a horizontal plane
T m (v2 / r)
OR
T m r w2
What is the physical meaning of the formula?
  • What happens if the initial speed v of the bob is
    forced to move faster?
  • A greater T is needed, i.e. greater M, to
    keep the radius of motion r.It will slide out to
    attain a greater r.
  • What happens if there is energy lost due to
    friction on the plane?
  • v decreases ? By T mv2 / r, r
    decreases ? w increases
  • What happen if an additional mass is added to the
    weight M?
  • M moves down ? r decreases and T
    increases ? v and w increase v increases??
    How come the increase? Work done by centripetal
    force????

4
Uniform Circular motion
Uniform circular motion in a horizontal plane
T m (v2 / r)
OR
T m r w2
What is the physical meaning of the formula?
(4) What happens if the string suddenly break?
Tension suddenly disappears and
there is no more centripetal force. No
more circular motion can be maintained.
The bob will move with its velocity at the
instant the string breaksaccording to its
inertia.
Write a Comment
User Comments (0)
About PowerShow.com