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lew123189
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how to work out "frictional torque"
A Mass of 0.5 kg is suspended from a flywheel. If the mass is released from rest and falls a distance of 0.5 m in 1.5 s, calculate
the tension on the rope
the frictional torque, resisting motion
Mass of flywheel = 3 kg
radius of wheel = 300mm
radius of gyration = 121mm
so this is what i have worked out so far
velocity = d/t = 0.5/1.5 = 0.33
angular acceleration = (max mass velocity - initial velocity)/time = 0.33- 0 / 1.5 = 0.22
now i think tension = mass X (gravity X acceleration)
however i am not sure what acceleration they mean is it the angular or linear acceleration.
Torque = moment of inertia X angular acceleration
= (0.5X0.212squared)X0.22
= 0.022472 X 0.22 = 4.94X10 to the power of -3
so what i need to know is how to find the "frictional torque" and the "resisting motion"
thanks in advance
Lewis
A Mass of 0.5 kg is suspended from a flywheel. If the mass is released from rest and falls a distance of 0.5 m in 1.5 s, calculate
the tension on the rope
the frictional torque, resisting motion
Mass of flywheel = 3 kg
radius of wheel = 300mm
radius of gyration = 121mm
so this is what i have worked out so far
velocity = d/t = 0.5/1.5 = 0.33
angular acceleration = (max mass velocity - initial velocity)/time = 0.33- 0 / 1.5 = 0.22
now i think tension = mass X (gravity X acceleration)
however i am not sure what acceleration they mean is it the angular or linear acceleration.
Torque = moment of inertia X angular acceleration
= (0.5X0.212squared)X0.22
= 0.022472 X 0.22 = 4.94X10 to the power of -3
so what i need to know is how to find the "frictional torque" and the "resisting motion"
thanks in advance
Lewis
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