HELP ME FIRST(Rotational mechanics)

JEE Main 2015 Papers › Mechanics questions › HELP ME FIRST(Rotational mechanics)

Let there be a rod of length l(in a horizontal plane).End B is given a velocity 3m/s at an angle of 60 degrees in horizontal plane(+ve direction).
What is he minimum velocity of end A?
Ans.1.5 m/s
Please provide an explanation.

#Physics #Mechanics

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2 Answers

cipher1729 ·2010-02-20 10:33:14

one possible explanation:

rod cannot elongate, so velocity along rod must be constant.
So if we take vel of A in horizontal direction (v1)
and v2=3 m/s

v1= v2 cos 60
= 1.5 m/s

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bubai bubai ·2010-02-20 10:42:59

Thanks for the soln..
But could you simplify your explanation a bit more?

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HELP ME FIRST(Rotational mechanics)

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