The pump lifts 200 kg of water to a height of 1.2 m in 20 seconds. What is the power of the pump motor?

Initial data: t (duration of pump operation) = 20 s; m (mass of water lifted by the pump) = 200 kg; h (lifting height) = 1.2 m.

Reference data: g (acceleration due to gravity) = 9.81 m / s2 ≈ 10 m / s2.

The power of the pump motor can be calculated by the formula: N = A / t = ΔEp / t = m * g * h / t.

Let’s make the calculation: N = 200 * 10 * 1.2 / 20 = 120 watts.

Answer: The rated power of the pump motor is 120 W.