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1. Homework Statement
2. Homework Equations
3. The Attempt at a Solution
2. Homework Equations
3. The Attempt at a Solution
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That's the right value!1. Homework Statement
1. A wheel is initially at rest. An external torque of 60 N m is applied to the wheel for 12 s, giving the wheel an angular velocity of 800 rev/min. The external torque is then removed, and the wheel comes to rest 100 s later. Find the moment of inertia of the wheel and the frictional torque(constant)
2. Homework Equations
torque = moment of interia (I) . angular velocity
angular velocity = dw/dt
3. The Attempt at a Solution
angular acceleration = 800.2pi/60.12 = 20/9pi revs/s
You seem to have lost a pi here...mom of inertia = 60/(20/9) = 27kgm^2
Let's set up the equations first:Is this correct ? Then I don't know how to find the frictional torque? I have seen the equation net torque = ext torque + frictional torque ..although from this I don't know how to find net torque?