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hello, I've just started a mechanics course, and i don't quiet know how to start with this assignment:

In a taperecorder the information to pass the recording head with constant velocity. Therefore is has to rotate with decreasing velosity as the empty wind is getting filled.

What is the spools angular velocity, [tex] \omega [/tex], as function of

[tex] b [/tex], the tape's width

[tex] r_0[/tex], radius of the empty wind

[tex] v_0[/tex], velocity at the recording head

[tex] t[/tex], time

My first thought was, that the angular acceleration must be constant, but how does this help? and how can i solve this problem?

thanks

In a taperecorder the information to pass the recording head with constant velocity. Therefore is has to rotate with decreasing velosity as the empty wind is getting filled.

What is the spools angular velocity, [tex] \omega [/tex], as function of

[tex] b [/tex], the tape's width

[tex] r_0[/tex], radius of the empty wind

[tex] v_0[/tex], velocity at the recording head

[tex] t[/tex], time

My first thought was, that the angular acceleration must be constant, but how does this help? and how can i solve this problem?

thanks

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