A strap, rod, or something comparable is used to spin up the disc. I imagine someone hand-starting a lawnmower. If he pulls the strap with a final speed before pulling the strap away, what is the rotation rate of the disk, w in rev/s? The moment of inertia of a disc is /2MR?. There's no sliding.

A strap, rod, or something comparable is used to spin up the disc. I imagine someone hand-starting a lawnmower. If he pulls the strap with a final speed before pulling the strap away, what is the rotation rate of the disk, w in rev/s? The moment of inertia of a disc is /2MR?. There's no sliding.

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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Concept explainers

Centripetal Force

A particle, body, object or certain mass while travelling in a rotational path or semicircular path, experiences an inertia force. If that inertia force pulls the towards the inward of the imaginary circle in the rotation, it is termed as centripetal force.

Question

A strap, rod, or something comparable is used to spin up the disc. T imagine
someone hand-starting a lawnmower.
If he pulls the strap with a final speed before pulling the strap away, what is the
rotation rate of the disk, w in rev/s? The moment of inertia of a disc is 1/2MR?.
There's no sliding.
• Strap's final speed = v = 0.74 m/s.
• The disc's radius is R = 0.7 m
• The small disc's radius is 1 cm
• The disc's mass is M = 0.7 kg

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