3. A rowing machine consists of a solid disk with a radius of 20-cm and a mass of 19-kg. An athlete pulls on the attached cable with a force of 10-Newtons and causes the disk to accelerate. If the disk starts from rest, determine; a. The disk's moment of inertia. b. The magnitude of the torque applied by the athlete. C. The disk's angular acceleration. d. The disk's angular momentum at t = 5.0 sec.

3. A rowing machine consists of a solid disk with a radius of 20-cm and a mass of 19-kg. An athlete pulls on the attached cable with a force of 10-Newtons and causes the disk to accelerate. If the disk starts from rest, determine; a. The disk's moment of inertia. b. The magnitude of the torque applied by the athlete. C. The disk's angular acceleration. d. The disk's angular momentum at t = 5.0 sec.

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter8: Rotational Equilibrium And Rotational Dynamics

Section: Chapter Questions

Problem 33P: A large grinding wheel in the shape of a solid cylinder of radius 0.330 m is free to rotate on a...

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A soccer player extends her lower leg in a kicking motion by exerting a force with the muscle above the knee in the front of her leg. She produces an angular acceleration of 30.00 rad/s2 and her lower leg has a moment of inertia of 0.750kg-m2 What is the force exerted by the muscle if its effective perpendicular lever arm is 1.90 cm?
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Suppose a child gets off a rotating merry-go-round, Does the angular velocity of the merry-go-round increase, decrease, or remain the same if: (a) He jumps off radially? (b) He Jumps backward to land motionless? (c) He jumps straight up and hangs onto an overhead tree branch? (d) He jumps off forward, tangential to the edge? Explain your answers. (Refer to Figure 10.34).
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