Question

How does the tension in your arms compare when you let yourself dangle motionless by both arms and by one arm

Answer 1

When you support yourself with two arms, the tension in each arm is half of the tension you experience when you support your weight with only one arm.

The tension in your arm is directly proportional to the weight of your body.

T = W = mg

When you support your weight with your two arms;

• the upward force balancing the downward force due to the weight of your body will be distributed equally in both arms.

$Tension \ in \ each \ arm = \frac{Total \ weight \ of \ your \ body}{2}$

When you support the weight of your body with one arm,

• the upward force balancing the downward force due to your weight will be on only one arm

$Tension \ in \ the \ one \ arm = Total \ weight \ of \ your \ body$

Thus, when you support yourself with two arms, the tension in each arm is half of the tension you experience when you support your weight with only one arm.

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