A lift can hold 2000kg, friction is 4000N and power provided is 60HP. (1 HP = 746W) Find the maximum speed with which lift can move up.

An electric motor that can develop 1.0 hp is used is used to lift a mass of 25 kg through a distance of 10.0 m. What is the minimum time in which it can do this ? (Take g=10m//s^(2))

A lift is going up. The total mass of the lift and the passenger is 1500 kg. The variation in the speed of the lift is as shown in the figure. In the above problem, find the height to which the lift takes the passenger.

A lift is going up. The total mass of the lift and the passenger is 1500 kg. The variation in the speed of the lift is as shown in the figure. In the above problem, find the height to which the lift takes the passenger.

A lift is moving downwards. A body of mass 2 kg kept on the floor is pulled horizontally and is in motion. If the coefficient of friction between the body and floor is 1 // 2 , find the friction acting on the body if (a) lift is moving with a uniform velocity and (b) lift is moving with acceleration 5 m//s^(2) in the downward direction.

An elevator that can carry a maximum load of 1500 kg (elvator+ passengers) is moving up with a constant speed of 2 ms^(-1). The frictional force opposing the motion is 3000 N. Find the minmum power delvered by the motor to the elevator in watts as well as in horse power (g=10ms^(-2))

An elevator that can carry a maximum load of 1500 kg (elvator+ passengers) is moving up with a constant speed of 2 ms^(-1). The frictional force opposing the motion is 3000 N. Find the minmum power delvered by the motor to the elevator in watts as well as in horse power (g=10ms^(-2))

A motor-cyclist is moving up an incline 1 in 100 at the speed of 40 kilometres per hour. What is the horse power of the engine if the motor-cycle and its rider together weigh 200 kg, coefficient of friction between tyre and road is 0.1 and air resistance to the system at this speed is 0.5 N per kg of the system ? (746 watts = 1 H.P.)