Free answer instructions:1. At the top of the page write your name and problem version (A, B, or C)2. Carefully read the problem3. Write your solution to each sub-section separately (A, B, C) on paperYour solution can be turned in two ways:A. Scan or take a photo of your solution - make sure your scan is legibleMake sure your file is in jpeg or pdf format (other formats will need to be converted).Upload your scanned solution using the "Choose a File" button beneathB. Turn in a hard-copy with your name on it to SRTC 134 by 12:45PMVersion BA large disc-shaped grindstone is spinning at 500 revolutions/min. The grindstone has a mass 4.0 kgand radius 9.0 cm. The moment of inertia of a disc rotating about its center is given by I=MR²The power is shut off by the operator and to slow it down, she sharpens a 4 kg axe by holding itagainst the grindstone until it stops 7 s later. Assume the angular acceleration is constant while thegrindstone is slowing down.(A) Draw a diagram which shows the edge of the axe exerting a frictional torque on the largegrindstone. Indicate the direction of rotation of the grindstone with an arrow. Then label thedirection of the angular velocity (w) and the direction of the torque supplied by the axe (T) eachwith arrows.(B) Write relevant symbolic equation(s) which would provide a way to solve for angular accelerationand torque. Then solve these equations symbolically for torque exerted by the axe on the grindstonein terms of, the initial angular velocity (w), time it takes for the rotation to stop (t), the mass of thegrindstone (m), the radius of the grindstone (r) and any needed constants.(C) Solve for the magnitude of the angular acceleration and the net frictional torque exerted by theaxe on the grindstone.

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Answered: A large disc-shaped grindstone is…

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