The uniform seesaw is balanced at its center of mass, as seen below. The smaller boy on the right has a mass of 32.1 kg. What is the mass of his friend (in kg)?2.0 m -2.0 m→-4.0 m-kg (a) Calculate the angular momentum (in kg•m2/s) of an ice skater spinning at 6.00 rev/s given his moment of inertia is 0.450 kg-m2.kg-m?/s(b) He reduces his rate of spin (his angular velocity) by extending his arms and increasing his moment of inertia. Find the value of his moment of inertia (in kg-m2) if his angular velocity drops to1.00 rev/s.kg-m2(c) Suppose instead he keeps his arms in and allows friction with the ice to slow him to 3.00 rev/s. What average torque (in N•m) was exerted if this takes 18.0 seconds?N•m

Given data: The mass of smaller boy (m1) = 32.1 kg The distance of smaller boy from pivot (r1) = 4.0…

Answered: The uniform seesaw is balanced at its…

The uniform seesaw is balanced at its center of mass, as seen below. The smaller boy on the right has a mass of 32.1 kg. What is the mass of his friend (in kg)? F2.0 m -2.0 m→- 4.0 m- kg

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Center of Gravity of a system

The centre of gravity is a property that is based on the geometry of a rigid body or any particle. It is described as an equilibrium point or a hypothetical location where the total weight of the body is concentrated.

Question

The uniform seesaw is balanced at its center of mass, as seen below. The smaller boy on the right has a mass of 32.1 kg. What is the mass of his friend (in kg)?
2.0 m -2.0 m→-
4.0 m-
kg

(a) Calculate the angular momentum (in kg•m2/s) of an ice skater spinning at 6.00 rev/s given his moment of inertia is 0.450 kg-m2.
kg-m?/s
(b) He reduces his rate of spin (his angular velocity) by extending his arms and increasing his moment of inertia. Find the value of his moment of inertia (in kg-m2) if his angular velocity drops to
1.00 rev/s.
kg-m2
(c) Suppose instead he keeps his arms in and allows friction with the ice to slow him to 3.00 rev/s. What average torque (in N•m) was exerted if this takes 18.0 seconds?
N•m

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