Question

1.
A body is moving in a vertical circular path of radius
Runder critical condition as given in Figure. Find the
magnitude of change in velocity between two points
A and B​

Answer 1

Answer:Ans become zero

Explanation:

Answer 2

Answer:

Explanation:magnitude of change in velocity is v(final)—v(initial)

Speed at a is root(3gr) { as critical condition)

Speed at b is root(gr)

Change in velocity = root (gr)—root(3gr)

Ans —root(2gr)

Note magnitude of change in velocity is speed so we need not take vector quantity. So drop negetive sign

Ans root(2gr)