IIT JEE , AIEEE Forum - Physics , Mechanics

dave

can ne1 explain this prob?

popat.bp

post the ques pls

haseeb2009

this question has application of pseudo FORCE .. .... .. .

take the horizontal components of 'm' and then assuming m+M' as a system find the acceleration which is = T

then calculate the pseudo force

first REMEMBER TO DRAW A """"F.B.D""""

Greatdreams

first consider the free body diagrams
now for the mass M,
from fbd, T = Mg - Ma
For the combined mass (m+M')
T = (M'+m)a
equating both Mg =(M' + M + m)a
so a = Mg / (M' + M + m)

now consider the fbd of the mass m ,
ma cos x = mg sin x
so a = g tan x
Now equating this a with the formerly obtained a,
Mg/(m+M+M') = g tan x
so M cot x = M + M' +m

HENCE M = (M'+m/ cot x - 1)
ans
nudge me if u dnt understand

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