A stream of water flowing horizontally with a speed of` 15 m s^(-1)` gushes out of a tube of cross-sectional area `10^(-2) m^2` , and hits a vertical wall nearby. What is the force exerted on the wall by the impact of water, assuming it does not rebound ?

Explanation

Mass of water hitting the wall per second
` = 10^3 kg m^(-3) xx 10^(-2) m^2 xx 15 ms^(-1) = 150 kg s^(-1)`
Force by the wall = momentum loss of water per second ` =150 kg s^(-1) xx 15 ms^(-1) = 2.25 xx 10^3 N`