Work Energy And Power Question 107
Question: A steel ball of radius 2 cm is at rest on a frictionless surface. Another ball of radius 4cm moving at a velocity of 81 cm/sec collides elastically with first ball. After collision the smaller ball moves with speed of [RPMT 1999]
Options:
A) 81 cm/sec
B) 63 cm/sec
C) 144 cm/sec
D) None of these
Show Answer
Answer:
Correct Answer: C
Solution:
Ratio in radius of steel balls = 1/2
So, ratio in their masses
Let
