Question

A lift accelerated downward with acceleration a
A man in the lift throws a ball upward with
acceleration ao(ao <a). Then acceleration of ball
observed by observer, which is on earth, is
(a) (a + a.) upward (b) (a-ao) upward
(c) (a+ao) downward (d) (a - ao) downward​

Answer 1

applying pseudo force of lifts acceleration on ball. we get balls acceleration as a-ao as ao less than a the ball will appear moving downward.