collisions

JEE Mains 2015 Tutorials › Mechanics questions › collisions

Three identical balls are connected by light inextensible strings with each other as shown and rest over a smooth horizontal table. At the moment t=0, ball B is imparted a velocity. Calculate the velocity of A when it collides with C.

#Physics #Mechanics

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5 Answers

33

Abhishek Priyam ·2009-03-13 10:16:17

lol..

i cahanged answer thrice.. did calculation msitake..

Now by conservation of momentum when A and C collides... velcoity of B=v₀/3

By conservation of energy

mv₀²/2=1/2m(v₀/3)²+2mx²/2

x is speed of A and C

x= 2v₀/3

where V_o/3 is velocity in upward direction... so right componetn=v₀/√3

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1

satan92 ·2009-03-13 10:32:49

if not clear how velocity v₀/3

it is by conservation of momentum

finally when distance between A and C=0

then for the length to be L the velocities of all of them must be same

hence

mv₀=3mv^'

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33

Abhishek Priyam ·2009-03-13 10:36:37

tanx for giving the explanation... mere ko aaram ho gaya.. [4] [1]

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1

Shreyan ·2009-03-13 10:39:51

oh...got it..thanx..
even i did silly wala mistake!!! [4]

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RAJIVKUMAR SINGH ·2018-10-25 07:23:14

What would be the trajectory followed by A

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