What is the magnitude of the torque about his shoulder

  • Thread starter Thread starter leisiminger
  • Start date Start date
  • Tags Tags
    Magnitude Torque
Click For Summary
SUMMARY

The discussion focuses on calculating the torque exerted about an athlete's shoulder while holding a 4.0 kg steel ball with a 70 cm arm. When the arm is extended parallel to the floor, the torque can be calculated using the formula τ = r × F, where r is the length of the arm and F is the force due to gravity acting on the ball. Additionally, when the arm is held at a 50-degree angle below horizontal, the torque changes due to the angle of force application, requiring the use of trigonometric functions to resolve the effective lever arm.

PREREQUISITES
  • Understanding of basic physics concepts, specifically torque
  • Familiarity with the formula τ = r × F
  • Knowledge of trigonometry for angle calculations
  • Basic understanding of gravitational force (F = m × g)
NEXT STEPS
  • Calculate torque for various angles using the formula τ = r × F × sin(θ)
  • Explore the effects of arm length on torque magnitude
  • Investigate real-world applications of torque in sports and biomechanics
  • Learn about the relationship between torque and rotational equilibrium
USEFUL FOR

Students studying physics, athletes interested in biomechanics, and fitness professionals seeking to understand the mechanics of lifting and arm positioning.

leisiminger
Messages
11
Reaction score
0
An athlete at the gym holds a 4.0 steel ball in his hand. His arm is 70 long and has a mass of 4.0
What is the magnitude of the torque about his shoulder if he holds his arm straight out to his side, parallel to the floor?
What is the magnitude of the torque about his shoulder if he holds his arm straight, but 50 below horizontal?

I'm lost
 
Physics news on Phys.org


leisiminger said:
An athlete at the gym holds a 4.0 steel ball in his hand. His arm is 70 long and has a mass of 4.0
What is the magnitude of the torque about his shoulder if he holds his arm straight out to his side, parallel to the floor?
What is the magnitude of the torque about his shoulder if he holds his arm straight, but 50 below horizontal?

I'm lost

What is the definition of Torque?

That would be a good start.
 

Similar threads

Why Is the Calculated Torque About the Shoulder Incorrect?
  • · Replies 6 ·
Replies
6
Views
4K
Force and momentum in gymnastics position
  • · Replies 4 ·
Replies
4
Views
5K
Calculating Torque of Athlete's Arm at the Gym
  • · Replies 4 ·
Replies
4
Views
16K
Net torque of a person's shoulder, holding a weight
  • · Replies 2 ·
Replies
2
Views
11K
Calculating Torque: A Gym Athlete's Challenge
  • · Replies 4 ·
Replies
4
Views
3K
How to calculate required torque for a robot arm
  • · Replies 2 ·
Replies
2
Views
4K
Where on a rigid body is a resultant force applied?
  • · Replies 11 ·
Replies
11
Views
2K
How to calculate the magnitudes of three forces around a hexagon
  • · Replies 17 ·
Replies
17
Views
3K
Finding the mass of a ball and a rod using torque
  • · Replies 8 ·
Replies
8
Views
3K
Question about Momentum and torque
  • · Replies 10 ·
Replies
10
Views
1K