The bob a of a pendulum released from 30

Asked by admin @ 13/08/2021 in Physics viewed by 252 People

The bob A of a pendulum released from 30° to the vertical hits another bob B of the same mass at rest on a table as shown in figure. How high does bob A rise after the collision? Neglect the size of the bobs and assume the collision to be elastic.

Answered by admin @ 13/08/2021

The bob A will not rise after collision.

explanation :- a/c to question, "collision is elastic" .
and we know, in elastic collision, the velocities of bodies are interchanged. hence, the bob A will come to rest and bob B will move with velocity of bob A after collision.

note :- Elastic collisions are collisions in which both momentum and kinetic energy are conserved. The total system kinetic energy before the collision equals the total system kinetic energy after the collision.

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