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CBSE Class 11-science Answered

Hlw sir plz fast solve with explain quick fast I need to fast help 
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Asked by rajdhan.yadav187350 | 13 Nov, 2018, 11:36: AM
answered-by-expert Expert Answer
The force of 40 N is acting on point B at the end of L shaped object.
the moment of force in vector form is,
 
stack tau space with rightwards arrow on top equals space r with rightwards arrow on top space cross times F with rightwards arrow on top h e r e space r space i s space p e r p e n d i c u l a r space d i s tan c e space f r o m space t h e space o r i g i n space t o space t h e space f o r c e t h u s comma space tau space equals r. F T h u s space m o m e n t space o f space f o r c e space a t space p o i n t space A space equals space left parenthesis F cos theta right parenthesis.4 space plus space left parenthesis F sin theta right parenthesis space.2 F o r space m a x i m u m space m o m e n t space o f space f o r c e comma fraction numerator d I over denominator d theta end fraction space equals space 0 T h u s comma 4 F left parenthesis negative sin theta right parenthesis space plus space 2 F cos theta space equals 0 rightwards double arrow 2 F cos theta space equals space 4 F sin theta rightwards double arrow space fraction numerator sin theta over denominator cos theta end fraction space equals space 1 half rightwards double arrow tan theta space equals 1 half
Answered by Shiwani Sawant | 13 Nov, 2018, 01:17: PM

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