Answer :

(a) ball 1 and 3 the total mechanical energy is conserved.

For ball 1, friction is so large that starts rolling without slipping and gains rotational kinetic energy.

For ball 3, friction is negligible so there is no external force responsible for energy loss the energy is conserved.

(b) ball 1 acquires some rotational kinetic energy it will not be

able to reach C and thus will not reach point D

ball 2 loses its energy due to friction, thus it cannot reach point D

ball 3 has exactly the amount of energy to reach C and D because it does not roll and does not lose energy due to friction.

only ball 3 will reach point D

(c) ball 1 and 2 starts moving in the back direction before

reaching point C.

for ball 1, it loses its energy while slipping back to point B, thus it will not reach back to point A

for ball 2, it will have clockwise rotation as it moves backs to point B due to which there will be kinetic friction coming to play due to which it will lose energy and won’t be able to reach point A.

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
view all courses

A balloon filled Physics - Exemplar

A rocket acceleraPhysics - Exemplar

A curved surface Physics - Exemplar

A block of mass 1Physics - Exemplar

Which of the diagPhysics - Exemplar

The kinetic energHC Verma - Concepts of Physics Part 1

Which of the diagPhysics - Exemplar

<span lang="EN-USHC Verma - Concepts of Physics Part 1

The bob of a pendHC Verma - Concepts of Physics Part 1

The magnetic forcHC Verma - Concepts of Physics Part 1