How to calculate weight an arm can curl.

  • Thread starter Thread starter AustinMeredit
  • Start date Start date
  • Tags Tags
    Arm Curl Weight
AI Thread Summary
To calculate the weight an arm can curl, consider the forearm as a uniform rod with a length of 34 cm and a mass of 1.3 kg. The bicep inserts 3.5 cm from the elbow pivot and can exert a force of 800 N. Using torque equilibrium, the weight that can be curled is determined by balancing the torque produced by the bicep against the torque due to the weight at the end of the forearm. The calculation involves applying the formula for torque and solving for the weight. Understanding these principles will help in accurately determining the maximum weight that can be curled.
AustinMeredit
Messages
1
Reaction score
0

Homework Statement


Suppose the length of your forearm is 34cm and its mass is 1.3kg. If your bicep inserts into the forearm 3.5cm from the pivot (the elbow), and your biceps muscle can produce a force of 800 N, how much weight can you curl? Model your forearm as a uniform rod.

I have no idea what to do!

Please help!


Thanks in advance!
 
Physics news on Phys.org
Does this get you started?
 

Attachments

  • arm084.jpg
    arm084.jpg
    13.1 KB · Views: 940

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
View full post »
Thread 'Collision of a bullet on a rod-string system: query'

Thread 'Collision of a bullet on a rod-string system: query'

In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
View full post »
Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

What happens to the force acting on the elbow with a straight bicep?
Replies
10
Views
8K
How Much Force Must the Biceps Generate in an Isometric Exercise?
Replies
1
Views
2K
How Do You Calculate the Angular Acceleration of an Arm?
Replies
26
Views
22K
Elbow Flexion Joint Reaction Force
Replies
20
Views
2K
Biomechanics Biceps Problem - Classical Mechanics (Moment Arms/Forces)
Replies
8
Views
6K
How Do You Calculate Bicep Tension and Elbow Joint Forces in Physics Problems?
Replies
4
Views
10K
Calculating Torque by Muscle: Bicep Flexor Force & Upper Arm Bone Force
Replies
1
Views
5K
I Designing Rehabilitation Equipment for an Upper Limb (arm)
Replies
2
Views
2K
1.81 Muscles and Bones: Vector Magnitude Problem
Replies
1
Views
3K
Torque with an arm holding a weight
Replies
1
Views
29K

Hot Threads

Recent Insights

Back
Top