Centripetal acceleration and angles

  • Thread starter Bjamin0325
  • Start date
  • #1

Homework Statement


A block is hung by a string from the inside roof of a van. When the van goes straight ahead at a speed of 34 m/s, the block hangs vertically down. But when the van maintains this same speed around an unbanked curve (radius = 120 m), the block swings toward the outside of the curve. Then the string makes an angle theta with the vertical. Find theta.


Homework Equations


Fc=v^2/r


The Attempt at a Solution


All I could do was get the centripetal force, 34^2/120=9.63333N.

I have no idea where to go from here, and there are no similar problems I can find.

Thanks a million for any help.
 

Answers and Replies

  • #2
andrevdh
Homework Helper
2,128
116
The formula that you give is for the acceleration. So you calculated the centripetal acceleration.

The block will experience two forces - its weight, W, and the tension T in the string. The vertical component of the tension balances the weight of the block while the horizontal component supplies the necessary centripetal force.
 

Related Threads on Centripetal acceleration and angles

Replies
2
Views
960
Replies
3
Views
7K
  • Last Post
Replies
1
Views
640
  • Last Post
Replies
3
Views
828
  • Last Post
Replies
2
Views
5K
  • Last Post
Replies
4
Views
5K
Replies
13
Views
5K
  • Last Post
Replies
6
Views
4K
  • Last Post
Replies
3
Views
2K
Replies
3
Views
7K
Top