- #1

Krokodrile

- 45

- 3

- Homework Statement
- The permanent winds of a wind farm travel at 9 m/s, determine the kinetic energy of the winds (KJ/Kg) as well as their potential (w) if the mass flow (m) is 1300 Kg/s.

- Relevant Equations
- K.E = 1/2 mv^2 ; P.E = m*g*h

In this problem i don't find any way to obtain de kinetic energy in KJ/Kg because when i resolve the kinetic energy formula the result its:

1/2 (1300 kg/s) (9 m/s)^2 = 5850 kg * m/s (i don't obtain m^2/s^2, so KJ/Kg its not possible)

In the potential energy (w) part i obtain this:

m*g ( i don't have height) = (5850 kg * m/s) (9.8 m/s^2) = 57. 3 kg/s * m^2/s^2 = 57. 3 kg/s * KJ/Kg = 57. 3 KJ/s = 57,300 W

Its correct my answer?

1/2 (1300 kg/s) (9 m/s)^2 = 5850 kg * m/s (i don't obtain m^2/s^2, so KJ/Kg its not possible)

In the potential energy (w) part i obtain this:

m*g ( i don't have height) = (5850 kg * m/s) (9.8 m/s^2) = 57. 3 kg/s * m^2/s^2 = 57. 3 kg/s * KJ/Kg = 57. 3 KJ/s = 57,300 W

Its correct my answer?