A lift of mass 920 kg has a capacity of 10 persons. If average mass of person is 68 kg. Friction force between lift and lift shaft is 6000 N. The minimum power of motor required to move the lift upward with constant velocity 3 m/s is [`g = 10 m/s^2` ]

A carpenter of mass 50 kg is standing on a weighing machine placed in a lift of mass 20 kg. A light sring is attached to the lift. The string passes over a smooth pulley and the other end is held by the carpenter as shown. When carpenter keeps the lift moving upward with constant velocity :- (g=10m//s^(2))

A carpenter of mass 50 kg is standing on a weighing machine placed in a lift of mass 20 kg. A light sring is attached to the lift. The string passes over a smooth pulley and the other end is held by the carpenter as shown. When carpenter keeps the lift moving upward with constant velocity :- (g=10m//s^(2))

A spring balance is set in a stationary lift. A person of mass 50 kg is standing on that balance. What will be the change in the reading of the balance if the lift moves upwards with constant velocity?

A lifts is tied with thick iron wires and its mass is 1000 kg. The minimum diameter of wire, If the maximum accelertion of lifts is 1.2 m//s^(2) , is ( g = 9.8 m //s^(2) )

An elevator weighing 500 kg is to be lifted up at a constant velocity of 0.4 m/s what should be the minimum horse power of the motor used ?

A lift of mass 200 kg is moving upward with an acceleration of 3m//s^(2) . If g=10 m//s^(2) then the tension of string of the lift will be :

A lift weighing 250 kg is to be lifted up at a constant velocity of 0.20 m. What would be the minimum horse power of the motor to be used ?

A lift weighing 250 kg is to be lifted up at a constant velocity of 0.20 m. What would be the minimum horse power of the motor to be used ?

A body of mass 50 kg is hung by a spring balance in a lift. Calculate the reading of the balance when : The lift is descending with a constant velocity of 2 m/s.