Question: Water is flowing in a river at $2ms^{- 1}$. The river is 50 m wide and has an average depth of 5 m...

Question

Water is flowing in a river at $2ms^{- 1}$ . The river is 50 m wide and has an average depth of 5 m. The power available from the current in the river is:

(Density of water = 1000 kg m^-3-3)

Answer 1

Solution

Power = kinetic energy of water flowing per second

$= \frac{1}{2}$ ×area of cross-section × density × (velocity)³

$= \frac{1}{2} \times 50 \times 5 \times 1000 \times 2^{3}W = 10^{6}W = 1MW$

Question: Water is flowing in a river at \(2ms^{- 1}\). The river is 50 m wide and has an average depth of 5 m...

Solution