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a)How many revolutios per minute must the apparatus shown in below figure make about a vertical axis so that the cord makes an angle of 45 0 with the vertical? b) What is the tension in the cord then. Given l = √2 m, a = 20 cm and m = 5 kg?

 


 a)How many revolutios per minute must the apparatus shown in below figure make about a vertical axis so that the cord makes an angle of 450 with the vertical?


b) What is the tension in the cord then.  Given l = √2 m,  a = 20 cm and m = 5 kg?


 

 


6534-604_1925_jrk.bmp


Grade:11

1 Answers

Badiuddin askIITians.ismu Expert
148 Points
14 years ago

Dear J kiran

Diagram is not clear please upload it again and post your question

This type of problem can be solved by taking component of tension

T cos45 = mg

Tsin45 =mw2r    where r =lsin45

so T =mw2l

 

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