Question

A jet of water with area of cross section 2cm^2 strikes a wall at an angle 60 degrees to the normal and rebounds elastically from the wall with the same speed. If the speed of water in the jet is 10m/s, then find the force acting on the wall.

Answer 1

Answer:

hi i need some points please help me

Answer 2

Answer:

Answer

Correct option is

B

86.4N

F =

dt

dP

=

dt

2dmVcos60

o

=

dt

2(ρAdx)Vcos60

o

= 2ρAV

2

cos60

o

= 10

3

×6×10

−4

×12

2

=86.4N