The triceps muscle in the back of the upper arm is primarily used to extend the forearm. Suppose this muscle in a professional boxer exerts a force of 1.9 * 103 N with an effective perpendicular lever arm of 2.85 cm, producing an angular acceleration of the forearm of 150 rad/s2?

Question

Physics

Demetrius Taylor

22 July, 15:19

The triceps muscle in the back of the upper arm is primarily used to extend the forearm. Suppose this muscle in a professional boxer exerts a force of 1.9 * 103 N with an effective perpendicular lever arm of 2.85 cm, producing an angular acceleration of the forearm of 150 rad/s2?

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Answers (1)

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Jakob Schwartz · Answer 1

I=0.0361 kg. m^2

Explanation:

Torque is the rotational equivalent of a force

Torque = perpendicular distance r X Force F

Torque T = I (moment of inertia) X α (angular acceleration)

T = Iα

r = 0.0285m

F = 1.9 x 10^3

T=0.0285 x 1.9 x 10^3

T = 54.15Nm

I=T/α

I=54.15/150

I=0.361 kg. m^2