Question

Calculate the angle 'theta for which if the particle A is
released, it undergoes perfectly elastic collision
with another identical mass B placed at rest and B
is found to just reach the horizontal position of its
string
20
{
B
(1) 30°
(2) 60°
(3) 37°
(4) 53°​

Answer 1

Answer:

1) 30° is answer dear friend