- #1
gfhfgh
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Hi,
on the net I found some equation, and would like to know if they are correct ones.
http://www.upei.ca/~physics/p261/projects/flywheel1/flywheel1.htm
http://hyperphysics.phy-astr.gsu.edu/hbase/rke.html
Physics:
Stored energy = sum of kinetic energy of individual mass elements that comprise the flywheel
Kinetic Energy = 1/2*I*w2 , where
I = moment of inertia (ability of an obeject to resist changes in its rotational velocity)
w = rotational velocity (rpm)
I = k*M*R2 (M=mass; R=radius); k = inertial constant (depends on shape)
Inertial constants for different shapes:
Wheel loaded at rim (bike tire); k = 1
solid disk of uniform thickness; k = 1/2
solid sphere; k = 2/5
spherical shell; k = 2/3
thin rectangular rod; k = 1/2
But I searched for that "I" (inertia momentum) on the Wiki http://en.wikipedia.org/wiki/Moment_of_inertia and there is not like it say above "I=k*m*w2"
on the net I found some equation, and would like to know if they are correct ones.
http://www.upei.ca/~physics/p261/projects/flywheel1/flywheel1.htm
http://hyperphysics.phy-astr.gsu.edu/hbase/rke.html
Physics:
Stored energy = sum of kinetic energy of individual mass elements that comprise the flywheel
Kinetic Energy = 1/2*I*w2 , where
I = moment of inertia (ability of an obeject to resist changes in its rotational velocity)
w = rotational velocity (rpm)
I = k*M*R2 (M=mass; R=radius); k = inertial constant (depends on shape)
Inertial constants for different shapes:
Wheel loaded at rim (bike tire); k = 1
solid disk of uniform thickness; k = 1/2
solid sphere; k = 2/5
spherical shell; k = 2/3
thin rectangular rod; k = 1/2
But I searched for that "I" (inertia momentum) on the Wiki http://en.wikipedia.org/wiki/Moment_of_inertia and there is not like it say above "I=k*m*w2"