A body of mass m 1 strikes a stationary body of mass m 2 . If the collision is elastic and head- on, the fraction of kinetic energy transmitted by the first body to the second body is -
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
m 1 u 2
= 
+ 
e = 
⇒ u = v 2
– v 1 m 1 u = m 1 v 1 + m 2 v 2
m 1 u = m 1 v 1 + m 2 (u + v 1 )
(m 1 – m 2 ) u = (m 1 + m 2 ) v 1 ⇒ v 1 = 
v 2 = u + 
= 
⇒ KE i = 
m 1 u 2
KE transfer = 
=
Fraction = 
= 
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