Question

A motor pump lifts water for an average depth of 15m at the rate of 5kg/s. If the water is coming out of the pump with a velocity of 4m/s. The power of the motor is
A. 200 w
B. 790 w
C. 395 w
D. 1580 w

Answer 1

Answer:

your

answers will be I think so 395w

Answer 2

Answer:

(B) is correct.

Explanation:

Given that,

Depth = 15 m

Rate = 5 kg/s

Velocity = 4 m/s

We need to calculate the power of the motor

Using formula of motor

$P=\dfrac{mgh}{t}$

Where, h = depth

m = mass

t = time

Put the value into the formula

$P=5\times9.8\times15$

$P=735\ W$

Hence, out of given option , B nearly equal to the 735 W.