Answer :

for elastic collision initial K.E. = final K.E.

let m be the mass of each ball bearings


K.E. before collision =


Now, K.E after collision in different cases


Case(a):


Case (b):


Case (c):


Case (d):


From the above cases we see that in case(b) K.E. is conserved.


Option (b) is correct.

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses
RELATED QUESTIONS :

A ball of mass m,Physics - Exemplar

During inelastic Physics - Exemplar

Two identical balPhysics - Exemplar

Two blocks MPhysics - Exemplar

The bob A of a peNCERT - Physics Part-I

In an elastic colPhysics - Exemplar

The bob A of a pePhysics - Exemplar