Question

Two pendulum bobs have equal masses and lengths (8.100 m). bob a is initially held horizontally while bob b hangs vertically at rest. bob a is released and collides elastically with bob
b. how fast is bob b moving immediately after the collision?

Answer 1

Since both hv same mass and elsstic collision, so their velocity will exchange. Bob A will stop and bob B will move with speed of A just before the collision.

Speed will be = squreroot ( 2*g*L)

L is length of pendulum

Answer 2

bob is the bobbiest of them all