Rotational Mechanics

A uniform bar is pivoted about one end. Initially it is held vertical and allowed to fall. When its angular displacement is 180°, its acceleration is

a) g b) 2g c) 3g d) 4g

sry i can't confirm the answer

9 Answers

1
Amit Kumar ·

anyone ?

106
Asish Mahapatra ·

i am assuming you wanted to ask :
A uniform bar is pivoted about one end. Initially it is held horizontal and allowed to fall. When its angular displacement is 180°, its acceleration is

??

1
Amit Kumar ·

no yaar the question said vertical only.

1
albert einstein ·

4g ?

1
Amit Kumar ·

dunno the answer....method to batao kaise aaya wo....i don't hav the answer..sry about that [2]

1
redox ·

i m not sure, let me think
check with this;;

By cons of energy ω2=6g/L;

dm=(m/L) dx

Centrifugal force=∫dm ω2x (0 to L)

net force downward is mg+centrifugal force= 4 Mg

1
Vinay Arya ·

You do not have any answer.It means that this problem has been framed by you.

1
redox ·

seems so

1
hillol0biswas ·

Two particles of mass m & 2m r fixed to a thin uniform circular loop of mass m & radius(15/11) cm at its diametrically opposite ends.The velocity of centre of the loop is v when it is in pure rolling. find the max. value of v so that the loop does not loose contact with the ground.

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