A fire engine must lift 30 kg of water a vertical distance of 20 m each second. What is the amount of power needed for the water pump for this fire hose?

600Watts

Explanation:

Power is defined as the rate of change in work done and work is said to be done if a force is applied to cause an object to move through a distance.

Mathematically Power = Work done/Time

Since work done = Force × Distance

Power = Force × Distance/Time

Given mass = 30kg

Force = ma = 30×10 = 300N

Distance = 20meters

Time = 1second

Substituting this values in the formula we have;

Power = 300×20/1

Power = 600Watts or 600J/s

Therefore, the amount of power needed for the water pump for this fire hose is 600Watts

the simple machine has three main features. they are:

fulcrum is the center point or pivot point of the machine. effort is input force/ applied force. load is external force/ output.

the keisha 's machine labels are

x : load

y: fulcrum

z: lever

hi there!

out of the two, (b) precision would be more reasonable.   however, both a and b could be pretty reasonable.

-awesomerepublic   : )