Centripetal force/acc problem

  • Thread starter iamtrojan3
  • Start date
  • #1
56
0

Homework Statement


What angular velocity would cause a centripetal acceleration of 3 g's if the radius were 2.5 m?

i have a test 2moro on this stuff... yea i need to know =D thx


Homework Equations



i guess m(v^2)/r or mW^2r

The Attempt at a Solution



no idea. srry :confused:
 

Answers and Replies

  • #2
703
13

Homework Equations



i guess m(v^2)/r or mW^2r
What is the W? And what do you calculate with mW^2r?
 
  • #3
56
0
W is rotational velocity.. sryy for not making that clear.
(MASS)(W^2)(radius)=centripetal Force
W^2R= Centripetal Acceleration
I just plugged numbers in 29.4= W^2(2.5) and i got 3.4radian/sec for W.
this looks 2 easy... if someoen could verify please =D
 
  • #4
703
13
Yes, very good, your answer is correct. But you should also write down the units, for example acceleration is in m/s^2 and radius in m. This allows you to check whether your result is correct.

For example if you calculated W as something with 1/s^2, you know you made a mistake because the unit must be 1/s (or radian/sec).
 
Last edited:
  • #5
56
0
thanks tons edgardo!
 

Related Threads on Centripetal force/acc problem

Replies
3
Views
2K
  • Last Post
Replies
3
Views
1K
  • Last Post
Replies
4
Views
3K
  • Last Post
Replies
7
Views
2K
  • Last Post
Replies
5
Views
1K
  • Last Post
Replies
3
Views
8K
  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
3
Views
2K
  • Last Post
Replies
14
Views
2K
  • Last Post
Replies
1
Views
2K
Top