The average angular speed of the grindstone is 10 rad/s

<h3>Further explanation</h3>
<em>Let's recall </em><em>Angular Speed</em><em> formula as follows:</em>



<em>where :</em>
<em>ω = final angular speed ( rad/s )</em>
<em>ω₀ = initial angular speed ( rad/s )</em>
<em>α = angular acceleration ( rad/s² )</em>
<em>t = elapsed time ( s )</em>
<em>θ = angular displacement ( rad )</em>

<u>Given:</u>
radius of the grindstone = R = 4.0 m
initial angular speed = ω₀ = 8.0 rad/s
final angular speed = ω = 12 rad/s
elapsed time = t = 4.0 seconds
<u>Asked:</u>
average angular speed = ?
<u>Solution:</u>
<em>Firstly , we will calculate </em><em>angular displacement </em><em>as follows:</em>





<em>Next , we could calculate the </em><em>average angular speed</em><em> as follows:</em>




<h3>Learn more</h3>

<h3>Answer details</h3>
Grade: High School
Subject: Physics
Chapter: Rotational Dynamics
I believe the answer is C- payload
To solve this problem it is necessary to apply the concepts related to gravity as an expression of a celestial body, as well as the use of concepts such as centripetal acceleration, angular velocity and period.
PART A) The expression to find the acceleration of the earth due to the gravity of another celestial body as the Moon is given by the equation

Where,
G = Gravitational Universal Constant
d = Distance
M = Mass
Radius earth center of mass
PART B) Using the same expression previously defined we can find the acceleration of the moon on the earth like this,



PART C) Centripetal acceleration can be found throughout the period and angular velocity, that is

At the same time we have that centripetal acceleration is given as

Replacing



Answer:
Part a)
distance = 112 miles
Part b)
current position = 112 miles from the position of town
Explanation:
Part a)
Since the distance marker is showing the distance between the town and the position of john at all time
so here we have

Part b)
Current position of John is given as

from the position of the town
By using Displacement method we can find volume of irregular object like marble.
<h3>What is
displacement method?</h3>
In displacement method,
First , we measuring the volume of water displaced by an object which tell us the volume of the object.
Secondly We can use the physical balance to determine its mass.
Lastly , calculate the density by dividing the mass by the volume.
Procedure to find the Volume of irregular object i.e. marble
step 1 - Fill the graduated cylinder about half full and measure the initial volume of water.
step 2 - Drop the marble in the graduated cylinder.
step 3 -Now measure the final level of water.
Step 4 - Subtract both the values.
Here , comes the Volume of Irregular Object.
For more volume related question visit here:
brainly.com/question/1578538
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