MECHANICS

i think you mean that the horizontal external force is zero [1]

philip can u solve it..... sum more hintssssss........ LOL......

take point of contact as (0,0)

and find the x component of the COM
if it turns out to be R/4 (it should turn out to be this)

problem solved [1]

sorry now feeling too lazy to put pen on paper so didnt give it a serious try

but i think it is correct

well, is the ans a?

can u explain how to get 'a' as answer sky

ya b is what it should be did you get it now tapan

arey haan yaar b hi hai :)

i did some calculation mistake...

very sorry .......

oh k gr8 thnx........

but how did u get orig center of mass as da mid pt line joinin centre and mid pt of rod?????????

is it a prop or sumthing???

genereal dbt :

how do u calculate COM of such figures??????

and here it is given that mass of both are same...

so com of combination will be midpoint of the two ..

i hope u got?

YEAH!!!!!!!!!!!!!!!

HAD FORGOTTEN EQUAL MASSES............

GUD GUD..... THNX YAAR.......