sealedhuman77
Mar25-08, 01:15 PM
1. The problem statement, all variables and given/known data
Massive spinning flywheels (disks) can be used for storing energy. Consider a flywheel with a diameter of 1.10 m and a mass of 510 kg. A constant force of magnitude F is applied tangentially to the rim of the flywheel to accelerate it from rest to 4.00 x 103 rev/min during 2.85 min.
(b) What magnitude of torque is necessary to cause this angular acceleration?
2. Relevant equations
I = mR^{2}
\tau = I\alpha
3. The attempt at a solution
I = mR^{2}
I = (510kg)\ast(.55m)^{2}
I = 154.275 kgm^{2}
\tau = I\alpha
\tau = (154.275kgm^{2})\ast(2.449rad/s^{2}
\tau = 377.819 Nm
The answer was incorrect. Also the angular acceleration was derived from part a and is the correct number. Thanks for the help.
Massive spinning flywheels (disks) can be used for storing energy. Consider a flywheel with a diameter of 1.10 m and a mass of 510 kg. A constant force of magnitude F is applied tangentially to the rim of the flywheel to accelerate it from rest to 4.00 x 103 rev/min during 2.85 min.
(b) What magnitude of torque is necessary to cause this angular acceleration?
2. Relevant equations
I = mR^{2}
\tau = I\alpha
3. The attempt at a solution
I = mR^{2}
I = (510kg)\ast(.55m)^{2}
I = 154.275 kgm^{2}
\tau = I\alpha
\tau = (154.275kgm^{2})\ast(2.449rad/s^{2}
\tau = 377.819 Nm
The answer was incorrect. Also the angular acceleration was derived from part a and is the correct number. Thanks for the help.