A lift accelerated downward with acceleration ‘ a ‘. A man in the lift throws a ball upward with acceleration  a0 (a0 < a) . The acceleration of the ball as observed by a man standing stationary on the ground is :

Q: A lift accelerated downward with acceleration ‘ a ‘. A man in the lift throws a ball upward with acceleration  a₀ (a₀ < a) . The acceleration of the ball as observed by a man standing stationary on the ground is :
(a) (a + a₀) upward

(b) (a – a₀) upward

(c) (a + a₀) downward

(d) (a – a₀) downward