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Answered

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3. A pump lifts 30 kg of water a vertical distance of 20 m each second. What is the power output?

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Sagot :

Halfzombiehalfalienidn

Answer:

3920 joules per second/3920 watts.

Explanation:

Given : mass = 40 kg ; height = 20 meters ; time = 2 seconds ; g = 9.8 m/s^2 ; Power = ?

Power is defined as the rate of doing work. The work done by the pump is equal to the gravitational potential energy expended by the pump. It is PE = mgh while Power is work ➗ time.

Solving for the power of the water pump

Power = mgh / t

Power = (40 kg * 9.8 m/s^2 * 20 m ) ➗ 2 s

Power = 3920 joules per second or 3920 watts.

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