nuscles in the back of the upper leg. The weight has mass 12.5 of inertia of the lower leg is 0.900 kg m2, the muscle force is he magnitude of the angular acceleration a of the weight.

Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter10: Rotational Motion
Section: Chapter Questions
Problem 23P: Find the net torque on the wheel in Figure P10.23 about the axle through O, taking a = 10.0 cm and b...
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While exercising in a fitness center, a man lies face down on a bench and lifts a weight with one lower leg by contracting the
muscles in the back of the upper leg. The weight has mass 12.5 kg, and is a distance of 28.0 cm from the knee joint. The moment
of inertia of the lower leg is 0.900 kg m2, the muscle force is 1470 N, and its effective perpendicular lever arm is 3.50 cm. Find
the magnitude of the angular acceleration a of the weight.
a =
rad/s?
How much work W is done if the leg rotates through an angle of 10.0° with a constant force exerted by the muscle?
W =
J
Transcribed Image Text:While exercising in a fitness center, a man lies face down on a bench and lifts a weight with one lower leg by contracting the muscles in the back of the upper leg. The weight has mass 12.5 kg, and is a distance of 28.0 cm from the knee joint. The moment of inertia of the lower leg is 0.900 kg m2, the muscle force is 1470 N, and its effective perpendicular lever arm is 3.50 cm. Find the magnitude of the angular acceleration a of the weight. a = rad/s? How much work W is done if the leg rotates through an angle of 10.0° with a constant force exerted by the muscle? W = J
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