A man stands on a platform that is rotating (without friction) with an angular speed of 2.1 rev/s; his arms are outreached and he holds a weight in each hand. The rotational inertia of the system of man, weights, and platform about the central axis is 15.00 kg m2. If by moving the weights the man decreases the rotational inertia of the system to 9.90 kg m2, a) what is the resulting angular speed of the platform?(rad/s) b) What is the ratio of the new kinetic energy of the system to the original kinetic energy?
A man stands on a platform that is rotating (without friction) with an angular speed of...
A man stands on a platform that is rotating (without friction) with an angular speed of 1.29 rev/s; his arms are outstretched and he holds a brick in each hand. The rotational inertia of the system consisting of the man, bricks, and platform about the central axis is 4.66 kg.m^2. If by moving the bricks the man decreases the rotational inertia of the system to 1.03 kg-m^2, (a) what is the resulting angular speed of the platform and (b) what...
A man stands on a platform that is rotating (without friction) with an angular speed of 1.76 rev/s; his arms are outstretched and he holds a brick in each hand. The rotational inertia of the system consisting of the man, bricks, and platform about the central axis is 7.65 kg·m2. If by moving the bricks the man decreases the rotational inertia of the system to 2.27 kg·m2, (a) what is the resulting angular speed of the platform and (b) what...
A man stands on a platform that is rotating (without friction) with an angular speed of 1.30 rev/s; his arms are outstretched and he holds a brick in each hand. The rotational inertia of the system consisting of the man, bricks, and platform about the central axis is 4.34 kg·m2. If by moving the bricks the man decreases the rotational inertia of the system to 2.26 kg·m2, (a) what is the resulting angular speed of the platform and (b) what...
A man stands on a platform that is rotating (without friction) with an angular speed of 1.61 rev/s; his arms are outstretched and he holds a brick in each hand. The rotational inertia of the system consisting of the man, bricks, and platform about the central axis is 7.06 kg·m2. If by moving the bricks the man decreases the rotational inertia of the system to 1.96 kg·m2, (a) what is the resulting angular speed of the platform and (b) what...
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A man stands on a platform that is rotating (without friction) with an angular speed of 2.35 rev/s; his arms are outstretched and he holds a brick in each hand. The rotational inertia of the system consisting of the man, bricks, and platform about the central axis is 5.13 kg.m2. If by moving the bricks the man decreases the rotational inertia of the system to 1.28 kg.mp, (a) what is the resulting angular speed of the platform and (b)...
A man stands on a frictionless platform that is rotating with an angular speed of 3.5 rad/s; his arms are outstretched and he holds a weight in each hand. With his hands in this position the rotational inertial of the system of man, weights, and platform is 6.0 kg*m2. 1. If by moving the weights the man decreases the rotational inertial of the system to 3.5 kg*m2, what is the resulting angular speed of the platform? 2. What is the...
Chapter 11, Problem 045 Your answer is partially correct. Try again. A man stands on a platform that is rotating (without friction) with an angular speed of 1.80 rev/s; his arms are outstretched and he holds a brick in each hand. The rotational inertia of the system consisting of the man, bricks, and platform about the central axis is 7.45 kg.m2. If by moving the bricks the man decreases the rotational inertia of the system to 1.78 kg.m?, (a) what...
A person of mass 77 kg stands at the center of a rotating merry-go-round platform of radius 2.8 mand moment of inertia 840 kg⋅m2 . The platform rotates without friction with angular velocity 0.95 rad/s . The person walks radially to the edge of the platform. Calculate the rotational kinetic energy of the system of platform plus person before and after the person's walk.
A person of mass 55 kg stands at the center of a rotating merry-go-round platform of radius 3.4 m and moment of inertia 670 kg · m2. The platform rotates without friction with angular velocity 2.0 rad/s. The person walks radially to the edge of the platform. (a) Calculate the angular velocity when the person reaches the edge. ......................... rad/s (b) Calculate the rotational kinetic energy of the system of platform plus person before the person's walk. ..........................J (c) Calculate...
A person of mass 70 kg stands at the center of a rotating merry-go-round platform of radius 3.4 m and moment of inertia 940 kg⋅m2 . The platform rotates without friction with angular velocity 1.6 rad/s . The person walks radially to the edge of the platform. Calculate the angular velocity when the person reaches the edge. In rad/sec Calculate the rotational kinetic energy of the system of platform plus person before and after the person's walk. In J.