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College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000

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BuyFindarrow_forward

College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000
Textbook Problem

Using data from the previous problem, find the increase in rotational kinetic energy, given the core’s mass is 1.3 times that of our Sun. Where does this increase in kinetic energy come from?

To determine

The increase in rotational kinetic energy and the source for the increase in kinetic energy.

Explanation

Given:

Frequency =964rev/s

Formula used:

  KE = 122I= 25Mr2

Where,

K = Kinetic Energy

I = Moment of Inertia

  ω= angular velocity

M= Mass in Kg

R = radius

Calculation:

  KE = 122I= 25Mr2KEi = 12(25Mr2i2=12(25Mr2)(2πf)2= 0.2 x 1

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