A lift starts moving down with `20 m//s^(2)`. Then which of the following is not true ?

When a lift is moving up with a uniform speed of 1 m/s. the weight of a man recorded bby a weighing machine in the lift is 70 kg . If the lift starts moving down with a uniform speed of 2 m/s, the weight of the man recorded by the weighing machine will be

A block of mass 2kg is kept inside a lift. Lift starts moving downward with an acceleration of a=12m/ s^(2) .Height of the lift is 4m .Time after which block will strike roof of the lift is?

A barometer kept in a lift reads 11 cm of mercury, when the lift is stationary. Then the lift starts moving down with an acceleration a, where a lt g. What is the air pressure in the lift, as read by the barometer ?

A block of mass m is kept on an inclined plane of a lift moving down with acceleration of 2m//s^(2) . What should be the coefficient of friction for the block to move down with constant velocity relative relative to lift?

A ball of mass 150g starts moving at 20 m/s^2 and hit by a force which acts on it for 0.1 second. Then the impulsive force is

A block of mass m is kept on an inclined plane of a lift moving down with acceleration of 2 m//s^(-2). What should be the coefficient of friction to let the block move down with constant velocity relative to lift :

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 ground are respectively

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 ground are respectively

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 ground are respectively

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 :