Elasticity.

An easy one...
Q.A rod is rotating about center with angular speed w. If the Young modulus of elasticity of rod is Y and length and cross sectional area is l and A respectively. Find the elongation in rod.

11 Answers

62
Lokesh Verma ·

No takers for this questions! :O

1
Samarth Kashyap ·

is it (mω2l2)/(12AY) [7][7]

1
kamalendu ghosh ·

mera toh mw2l2/4AY aya

1
MATRIX ·

im getting mω2l2 /4AY

1
Samarth Kashyap ·

i think i'm wrong, cud u post method plz

also plz try this http://targetiit.com/iit_jee_forum/posts/potential_difference_9184.html

33
Abhishek Priyam ·

din know the answer... sirf kuch q apne se de diye..

anyone ... willing to post soln.. or i have to solve...(12th ke baad kuch solve karne ka man nahi karta :P)

24
eureka123 ·

has any one did it ??
If yes then plz give ur answers here..just answer

24
eureka123 ·

This is my soln.....Plz tell me if its correct or not ??

3
msp ·

u missed the three in denominator.

3
msp ·

eure the total elongation is not 2xdl.

u have to change the limits to -l to l

24
eureka123 ·

[7][7]

the elongation in upper part will be equal to elongation in lower part..

so I cant see where it is wrong.

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