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# Easy Maths power question watch

Q : A pump is used to raise water from ground level to a tank of 5m. The pump is able to pump 5000 litres per hour. Find the power of the pump. ( Mass of 1 litre of water is 1 kg)

A ; 68.1W

How do you get to this I'm so confused!
2. (Original post by SmurfyZ)

Q : A pump is used to raise water from ground level to a tank of 5m. The pump is able to pump 5000 litres per hour. Find the power of the pump. ( Mass of 1 litre of water is 1 kg)

A ; 68.1W

How do you get to this I'm so confused!

Watt's are Joules per Second.

So, you're interested in the amount of work done per second.

5000 l/hr is how many per second?
Mass is?
Then weight is?
Moving through a distance of 5 metres gives .... W.
3. (Original post by ghostwalker)
Watt's ares Joule per Second.

So, you're interested in the amount of work done per second.

5000 l/hr is how many per second?
Mass is?
Then weight is?
Moving through a distance of 5 metres gives .... W.

Thank you so much! i understand it now. Lol that was so easy its embarrassing

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