Q.
Three identical spherical balls $A,\ B$ and $C$ are placed on a table as shown in the figure along a straight line. $B$ and $C$ are at rest initially
The ball $A$ and $B$ head on with a speed of $10ms^{- 1}$. Then after all collisions (assumed to be elastic) $A$ and $B$ are brought to rest and $C$ takes off with a velocity of
A) $5\ m\ s^{- 1}$
B) $10\ m\ s^{- 1}$
C) $2.5\ m\ s^{- 1}$
D) $7.5\ m\ s^{- 1}$
Explanation
The correct answer is Option B: $10\ m\ s^{- 1}$.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.