19-04-09 Mechanics

a bob suspended ina trolley is displaced 45* and is released. what is the tension in the strind just after the bob is released?? what is the acceleration of the trolley just after the bob is released??

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9 Answers

1
Rohan Ghosh ·

nothing else is given

eg mass of trolley bob etc .. are thy same

i cudnt get the whole picture ..

9
Celestine preetham ·

rite know dont have paper pen to solve
will post ans tomorrow

HINT
wrt to trolley ,acc of bob must be perpendicular to string

1
Dharun ·

sir plz give mass of trolly & bob

9
Celestine preetham ·

u take it as m and M dharun

1
Rohan Ghosh ·

celestine the scenario is not clear at all to me!

perhaps you can make it ..

1
Philip Calvert ·

i think we have to assume variables over here.
like m and M

rest is clear isn't it ?

1
Rohan Ghosh ·

on the basis of what i have understood it comes pretty straightforward ..
ans=

√2Mm/(2M+m)

M = trolley and m= bob

1
Rohan Ghosh ·

oops i missed a g

T=√2Mmg/(2M+m)

now everything else can be calculated

9
Celestine preetham ·

yes rohans right

u can find a = √2 (M+m)g/(2M + m)

jee 2010 aspirants this is a must do

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