A force 250N is required to lift a 1200N weight through a pulley system in order to lift the weight through 1m. The rope has to be pulled through 5. Find the efficiency of the system.

The time required for an elevater to life a weight varies directly with the weight and the distance through which it is to be lifted and inversely as the power of the motor. If its takes 30 seconds for a 10 hp moter to lift 100 lbs through 50 feet, what size of moter is requiered to lift 800 Ibs in 40 seconds through 40 feet?

A pulley system with V.R. = 4 is used to lift a load of 175 kgf through a vertical height of 15 m. The effort required is 50 kgf in the downward direction. (g=10Nkg^(-1)) Calculate : Efficiency of the pulley system.

1000 N force is required to lift a hook nd 10000 N force is reuires to lift a load slowly.Find power required to lift hook with load with speed v=0.5 m//s

1000 N force is required to lift a hook nd 10000 N force is reuires to lift a load slowly.Find power required to lift hook with load with speed v=0.5 m//s

A pulley system with a velocity ratio 4 is used to lift a load of 300 kgf to a vertical height of 10 m by applying an effort of 100 kgf downwards. ind the efficiency of the pulley system and the work done by the effort.

A pulley system has a velocity ratio 5. Draw a neat labelled diagram of the pulley system to lift a load by applying the effort in a convenient direction. Mark the tension in your diagram. If the efficiency of the system is 80% find its mechanical advantage.

William lifts a load by pulling the rope of a pulley system. Which force is applied by William to lift the load?

A pulley system with V.R. = 4 is used to lift a load of 175 kgf through a vertical height of 15 m. The effort required is 50 kgf in the downward direction. (g=10Nkg^(-1)) Calculate : M.A. of the pulley system.

250 N force is required to raise 75 kg mass from a pulley. If rope is pulled 12 m then the load is lifted to 3m, the efficiency of pulley system will be : -