Answer:
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
