# What is her new rotation frequency, in revolutions per second [Solved]

A 45 kg figure skater is rotating on feet of the woman skates at 1.0rev/sec . The woman hands are outstretched in terms of theyll get. Within orientation, the skater could be modeled as a cylindrical torso (40kg, 20cm typical diameter, 160cm high) plus two rod-like hands (2.5 kg each, 66 cm long) connected to the outside the torso. The skater then raises the woman hands directly above the woman mind, in which she is apparently a 45kg , 20-cm-diameter, 200-cm-tall cylinder.
w = 1.306 / 0.225 ==> w = 5.804444 rev/s

[kg * m^2]
We * w (last) = We * w (initial)

[kg * m^2]
We = m * r^2 / 2 ==> We = 0.225 [rev/s].

W/ .6 at first, 3.7 rev/s
Therefore, utilising the equation for angular energy, we understand the lady initial energy is:

and w may be the angular velocity of this item.

In which we may be the minute of inertia of this item
This is actually the minute of inertia for starters supply. We curently have as soon as of inertia on her behalf human body, so we are able to include the human body plus two hands to have the woman total minute of inertia:

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We = m * L^2 / 12 ==> We = 0.09075

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And lastly:

We = 0.09075 2.5 * 0.43^2 ==> We = 0.553

w = 1.306 / I
We = 0.2 2 * (0.553) == > We = 1.306

And lastly:

We = m * r^2 / 2 ==> We = 0.2 [kg * m^2]

w = 1.306 / I
We = 0.2 2 * (0.553) == > We = 1.306

w = 1.306 / I
We = 0.2 2 * (0.553) == > We = 1.306

(alarmed, yet attempts to keep composure) high priced ChaCha, Id the comparable amazing adventure occur within my home no greater helpful than weekly previously, despite the proven fact that mine connected bread. i trade into astonished within my success, yet essentially for just two moments, by means of reality used to do not aspire to go beyond the 3 2d guideline for ingesting the bread. I believe of this worldwide has no less than four greater years till now one thing catastrophic happens. Easily wish to be a doomsdayer, I will assert our lucky droppings are an illustration your worlds magnetic industry is gradually moving. When it is unquestionably the truth, I am pleased we are able to perish knowing that, for because quickly like in our everyday lives, we dropped one thing also it landed appropriate facet up.
We = m * L^2 / 12 ==> We = 0.09075

The idea you are working with heres: Conservation of Angular Momentum (just like preservation of energy, however in the rotational globe). Angular Momentum (L) can be located utilizing:

This post is last updated on hrtanswers.com at Date : 1st of September – 2022