# Frictional Torque

• Sep 12th 2013, 11:22 AM
Jock
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,
Mass of wheel = 3 kg
Outside radius of wheel = 300 mm
Radius of gyration = 212 mm
calculate:
(a) The linear acceleration of the mass. For this I got0.22ms^-2
(b) The angular acceleration of the wheel. For this I got 1.467 rad s^-2
(c) The tension in the rope. 4.96N
(d) The frictional torque, resisting motion. Providing my answers are correct for a, b and c how do I solve d? Also if someone can confirm my work till now is correct please that would be great.......
• Sep 12th 2013, 07:08 PM
topsquark
Re: Frictional Torque
Quote:

Originally Posted by Jock
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,
Mass of wheel = 3 kg
Outside radius of wheel = 300 mm
Radius of gyration = 212 mm
calculate:
(a) The linear acceleration of the mass. For this I got0.22ms^-2
(b) The angular acceleration of the wheel. For this I got 1.467 rad s^-2
(c) The tension in the rope. 4.96N
(d) The frictional torque, resisting motion. Providing my answers are correct for a, b and c how do I solve d? Also if someone can confirm my work till now is correct please that would be great.......

What have you tried so far?

-Dan
• Sep 12th 2013, 07:16 PM
Jock
Re: Frictional Torque
Came up with a figure but not sure its correct.....I got 1.209. Are the rest correct that I already have?