A water jet of area 0.01 m² strikes a wall at 2 m/s and stops. Calculate the power delivered by the water to the wall.
Q1. A water jet of area 0.01 m² strikes a wall at 2 m/s and stops. Calculate the power delivered by the water to the wall.
Answer: 80 W
Explanation: Power = Force * velocity. For a jet, F = (mass/time) * v = (ρAv) * v = ρAv². Power = ρAv³. Substituting values: 1000 * 0.01 * 8 = 80 W.