lift cases

A block is equilibrium at rest in a lift as shown in figure. Now lift starts acclerating. The minimum magnitude of acceleration of lift for which block will touch the floor of lift, is

A lift is going up. The variation in the speed of the lift is as given in the graph in the graph. What is the height to which the lift takes the passengers ?

The mass of a body in a lift at rest is m. If the lift ascends with uniform acceleration a, the effective mass will be

A block is hanging in a lift as shown in figure. If lift is falling freely then time period of block is

Assertion : In the case of free fall of the lift, the man will feel weightlessness. Reason : In free fall, acceleration of lift is equal to acceleration due to gravity.

A weighing machine inside a stationary lift reads 50 kg when a man stands on it. In which following cases can the reading be more than 50 kg ?

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 lift moves downwards with an acceleration a. A passenger in the lift drops a book. The acceleration of the book with respect to the floor of lift is- (assume acceleration due to gravity = g)