Static equilibrium - quarry crane

  • Thread starter ch010308
  • Start date
  • #1
10
0

Homework Statement



A quarry crane is used to lift massive rocks from a quarry pit. Consider the simplified model of such a crane shown in the figure. The ends of two poles are anchored to the ground at the same point (point O). From this point, one pole rises vertically and the second pole rises at an angle. The vertical pole has its free end connected to the ground via an unstretchable, massless rope labeled rope 1. A second rope, labeled rope 2, connects the free ends of the two poles. The angle between the tilted pole and rope 2 is θ. Both poles have length and can be considered massless for the purposes of this problem. Hanging from the end of the second pole, via rope 3, is a granite block of mass m.

Throughout this problem use g for the magnitude of the acceleration due to gravity.

Find T2, the tension in rope 2.



Homework Equations



At static equilibrium, sum of torque=0, sum of forces = 0.

The Attempt at a Solution



I think I need to use sum of torque (about point O??) but how? I don't understand the qns/ diagram..... Please help! Thanks:)
 

Attachments

Answers and Replies

  • #3
10
0
I tried to derive the answer from the hints given in that thread but I still got it wrong. :(

There's also another part to the question:
Find T1, the tension in rope 1.

Please help!
 

Related Threads on Static equilibrium - quarry crane

  • Last Post
Replies
2
Views
10K
  • Last Post
Replies
4
Views
10K
Replies
2
Views
12K
  • Last Post
Replies
1
Views
8K
  • Last Post
Replies
15
Views
3K
  • Last Post
Replies
1
Views
5K
  • Last Post
Replies
2
Views
10K
  • Last Post
Replies
1
Views
795
  • Last Post
Replies
1
Views
459
  • Last Post
Replies
1
Views
1K
Top