what should be the power of an engine required to lift 90 metric tonnes of coal per hour from a mine whose depth is 200 m ?

Find the power of an engine which lifts 90 metric tonnes of coal per hour from a depth of 200m.

What is the power of an engine which can lift 20 metric tonne of coal per hour from a 20-m deep mine?

Calculate the power of an engine required to lift 10^5 kg of coal per hour from a mine 360 m deep.

(a) What is the power of an engine which can lift 600 kg of coal per minut from a mine 20 m deep ? (b) A 2kW motor pumps out water from a well 10m deep. Calculated the quantity of water pumped out per second.

What is the power of an engine which can lift 600 kg of water per minute from 20 m deep well?

Calculate the input power of a machine if it can take out 500 kg of wet clay hour from a depth of 200 m with an efficiency of 0.7 .

A train of mass 10^(6) kg is going up an incline plane with incline 1 in 49 at a rate of 10m//s if the resistance due to friction be 10 N per metric ton, calculate the power of the engine. If the engine is shut off, how far will the train move before it comes to rest ? take g=9.8m//s^(2)