Equilibrium Question

  • Thread starter timtng
  • Start date
  • #1
25
0
Misako wishes to measure the strength of her biceps muscle by exerting a force on a test strap. The strap is 28 cm from the pivot point at the elbow, and her biceps muscle is attached at a point 5 cm from the pivot point. If the scale reads 18 N when she exerts her maximum force, what force is exerted by the biceps muscle?

See attachment for a diagram. Please help me solve this problem.
 

Attachments

Answers and Replies

  • #2
jamesrc
Science Advisor
Gold Member
476
1
Try summing the moments about the elbow. Since the arm is in equilibrium, they should sum to zero; that is how to find the unknown bicep force.
 

Related Threads on Equilibrium Question

  • Last Post
Replies
0
Views
3K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
5
Views
1K
  • Last Post
Replies
3
Views
999
  • Last Post
Replies
13
Views
2K
  • Last Post
Replies
1
Views
977
  • Last Post
Replies
11
Views
2K
  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
4
Views
2K
  • Last Post
Replies
1
Views
725
Top