# B) A pump is to raise 100 litre of water a height of 1.2 m in 10s. Calculate the power required assuming 1 litre of water has a mass of 1 kg?.

##### 2 Answers

#### Explanation:

Power (

I get

#### Explanation:

The mass of the water here is:

The weight of the water is therefore:

Work done is given by the equation:

where:

#W# is the work done in joules

#F# is the force exerted in newtons

#d# is the distance moved in meters

So, we get:

Power here is given by the equation:

where:

#P# is the power in watts

#W# is the work done in joules

#t# is the time taken in seconds

So, we get: