a jet of water with cross sectional area 'a' is striking against a wall at an angle theta with normal and rebounds elastically.If the velocity of water jet is 'v' and density is 'd' the normal force on wall is:
1) 2a(v^2)d cos theta
2) 2avd cos theta
3) a(v^2)d cos theta
4) avd cos theta
a jet of water with cross sectional area 'a' is striking against a wall at an angle theta with normal and rebounds elastically.If the velocity of water jet is 'v' and density is 'd' the normal force on wall is:
1) 2a(v^2)d cos theta
2) 2avd cos theta
3) a(v^2)d cos theta
4) avd cos theta