# A bit of help with vector aproach to mechanics please?

1. Jan 5, 2009

### foxandthehen

The axis of a disk with radius of 0.05m is fitted into a slot that forms an angle of 30degs with the vertical axis. The disk is at rest when it is placed in contact with a convayor belt moving at contsant speed. The coefficent of kenetic friction between the disk and the belt is 0.2 and there is no bearing friction.

a) Express the acceleration of the center of mass of the body, and its angular acceleration

b) Draw a free body diagram showing the applie forces and the eqivalent force diagram showing the vectror 'ma' or its conponents and 'Ia'

c) Write the three equations of motion and use them to determin the angular acceleration of the disk while slipping occurs.

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HELP! Where should I start? Any help and advice would be very much apreciated.

2. Jan 6, 2009

### foxandthehen

Has anyone got any ideas yet? I haven't shown my workings as they are all on paper and crazy wrong. Both a friend and I sat down for a few hours yesterday and tried this and another question and got nowhere and its due in for tomorrow!!! any ideas at all?

3. Jan 7, 2009

### LennoxLewis

See the other thread (with pic)