Please explain this interesting question in the figure...The answer is (3).
Q. Starting from rest on her swing at initial height above the ground, Saina swings forward. At the lowest point of her motion, she grabs her bag that lies on the ground. Saina continues swinging forward to reach maximum height . She then swings backward and when reaching the lowest point of motion again, she simple lets go off the bag, which falls freely. Saina's backward swing then reaches maximum height . Neglecting air resistance, how are the three heights related ?
(1)
(2)
(3)
(4)