A lift is moving down with acceleration a. A man in the lift drops a ball inside the lift. The acceleration of the ball as observed by the man in the lift and a man standing stationary on the around are respectively :

Options

A. g,g
B. g-a,g-a
C. g-a,a
D. a,g

Answer

c

Explanation

As the lift is descending with an acceleration .d., the acceleration of the ball for the man in the lift will be `(g-a)` and for the stationary man on the ground the acceleration will be g.. Hence choice is (c).