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༒ Bʀᴀɪɴʟʏ Sᴛᴀʀs

༒Mᴏᴅᴇʀᴀᴛᴇʀs

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A body sides down on a rough inclined plane and then over a rough plane surface . It starts at A and stops at D . The coefficient of friction is
Answer :- u=AB/BD Diagram :-
Refer attachemny​

Answer 1

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Force required to slide down is: F=−μmgcosθ+mgsinθ 

N=mgcosθ

Now NF=21=mgcosθ−0.5mgcosθ+mgsinθ

tanθ=1

⇒θ=45o

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