What Output Rating (Watts) Do I Need for a Pump to Lift 8kg of Water per Minute?

AI Thread Summary
To determine the output rating in watts for a pump lifting 8 kg of water per minute to a height of 3.50 m, the work done must be calculated using the formula for work, which is force times distance. The force is derived from the weight of the water, calculated as mass times gravitational acceleration. The total work done in one minute can then be converted into watts, knowing that 1 watt equals 1 joule per second. The discussion highlights the confusion among participants regarding the initial steps and components needed for the calculation. Understanding the relationship between watts, joules, and the work done is crucial for solving the problem effectively.
Bayley
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Homework Statement


A pump is to lift 8.00 kg of water per minute through a height of 3.50 m. What output rating (watts) should the pump motor have?


Homework Equations





The Attempt at a Solution


I have no idea how to even start.
 
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Which concept(s) do you think are involved?
 
Well think about what a Watt is. It is a J/s.
 
Well energy is measured in joules and work=fdcosΘ. So...
 
Bayley said:
Well energy is measured in joules and work=fdcosΘ. So...
Good, you're on the right lines. How much work does the pump have to do in one minute?
 
I don't know what the components are.
I'm so clueless about this because my teacher didnt have time to teach us, and he said just try and figure it out.
 
Bayley said:
I don't know what the components are.
I'm so clueless about this because my teacher didnt have time to teach us, and he said just try and figure it out.
Well, in one minute the pump lifts a mass of 8kg vertically upwards to a height of 3.50m...
 
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