What is the magnitude of the torque about his shoulder

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The discussion centers on calculating the torque about an athlete's shoulder while holding a 4.0 kg steel ball with a 70 cm arm. Torque is defined as the product of force and the distance from the pivot point, taking into account the angle of application. When the arm is parallel to the floor, the torque can be calculated using the weight of the ball and the arm's length. If the arm is held 50 degrees below horizontal, the angle affects the torque calculation due to the cosine of the angle. Understanding the definition of torque is essential for solving these scenarios accurately.
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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
 
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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.
 

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