Discussion :: Applied Mechanics  Section 5 (Q.No.2)
2. 
Pick up the correct statement from the following : 
[A]. 
If two equal and perfectly elastic smooth spheres impinge directly, they interchange their velocities.  [B]. 
If a sphere impinges directly on an equal sphere which is at rest, then a fraction (1  e^{2}) the original kinetic energy is lost by the impact.  [C]. 
If a smooth sphere impinges on another sphere, which is at rest, the latter will move along the line of centres.  [D]. 
If two equal spheres which are perfectly elastic impinge at right angles, their direction after impact will still be at right angles.  [E]. 
All the above. 
Answer: Option E
Explanation:
No answer description available for this question.
