An intense stream of water of cross-sectional area strikes a wall at an angle with the normal to the wall and returns back elastically. If the density of water is and its velocity is , then the force exerted in the wall will be

a) |
b) |
c) |
d) |

An intense stream of water of cross-sectional area strikes a wall at an angle with the normal to the wall and returns back elastically. If the density of water is and its velocity is , then the force exerted in the wall will be

a) |
b) |
c) |
d) |

1 Answer

127 votes

**(b)**

Linear momentum of water striking per second to the wall , similarly linear momentum of reflected water per second

Now making components of momentum along - axes and -axes. Change in momentum of water per second

By definition of force, force exerted on the Wall

127 votes

127