Question

40. A particle is moving in a vertical circle such that the
tension in the string at the topmost point B is zero.
The acceleration of the particle at point A is
(g = 10 m/s2)

(1) 10root5 m/s^2
(2) 10root10 m/s^2


(3) 10 m/s2
(4) 5root10 m/s2​

Answer 1

Answer:

can u mention where is the point A?

Explanation:

At the top most point,

T +mg = mv^2/r

given T = zero means

mg = mv^2/r

$v = \sqrt{gr}$

that is it have a min velocity to complete the circle