A uniform 4.4-kg metal bar is attached to a vertical post by a hinge. The bar is 1.8 m long and is tilted 23° above the horizontal. a) Find the net torque on the bar just as the bar is released. (Answer: –362 Nm) b) Find the moment of inertia of the bar. (Answer: 4.75 kgm²) c) Find the angular acceleration experienced by the bar. Just as the bar is released. (Answer: –7.62rad, s2

A uniform 4.4-kg metal bar is attached to a vertical post by a hinge. The bar is 1.8 m long and is tilted 23° above the horizontal. a) Find the net torque on the bar just as the bar is released. (Answer: –362 Nm) b) Find the moment of inertia of the bar. (Answer: 4.75 kgm²) c) Find the angular acceleration experienced by the bar. Just as the bar is released. (Answer: –7.62rad, s2

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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Question

*Problem 4:
A uniform 4.4-kg metal bar is attached to a vertical post by a hinge. The bar is 1.8 m long
and is tilted 23° above the horizontal.
a) Find the net torque on the bar just as the bar is released. (Answer: -362 Nm)
b) Find the moment of inertia of the bar. (Answer: 4.75 kgm²)
c) Find the angular acceleration experienced by the bar. Just as the bar is released.
(Answer: –7.62
rad,
s²

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