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A circular disc of mass '2m' and radius ...

A circular disc of mass `'2m'` and radius `'3r'` is resting on a flat frictionless surface. Another circular disc of mass m and radius `'2r'`, moving with a velocity `'u'`. hits the first disc as shown in the figure. The collision is elastic.
What is the final velocity of the heavier disc?

A

`(4v_(0))/(5)`

B

`(v_(0))/(2)`

C

`(3v_(0))/(5)`

D

`(2v_(0))/(5)`

Text Solution

Verified by Experts

The correct Answer is:
A
As seen from stress v/s strain curve the slope of A is greater than slope of B implies `Y_(A) gt Y_(B)`
& plastic region of B is wider than plastic region of A implies B is more ductile material.
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