hilé 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 10.5 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 1430 N, and its effective perpendicular lever arm is 3.45 cm. Find the magnitude of the angular acceleration a of the weight.
hilé 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 10.5 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 1430 N, and its effective perpendicular lever arm is 3.45 cm. Find the 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 10.5 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 1430 N, and its effective perpendicular lever arm is 3.45 cm. Find
the magnitude of the angular acceleration a of the weight.
26.6
rad/s2
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 :
7.99
J](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F679cbec7-7cf2-49ce-8f3f-bf2473fe518f%2F822ab861-88d5-4460-9112-ba5d9cd9eca7%2Fagigyhg_processed.jpeg&w=3840&q=75)
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 10.5 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 1430 N, and its effective perpendicular lever arm is 3.45 cm. Find
the magnitude of the angular acceleration a of the weight.
26.6
rad/s2
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 :
7.99
J
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