Question
Question: A stream of water flowing horizontally with a speed of v gushes out of a tube of cross-sectional are...
A stream of water flowing horizontally with a speed of v gushes out of a tube of cross-sectional area A, and hits a vertical wall nearby. The force of impact on the wall when the water does not rebounds is -
A
Av 2
B
Av2r
C
Avr
D
Ar
Answer
Av2r
Explanation
Solution
F = v. dtdm = v(Arv) = Arv2
[Note : dtdm = mass flow rate = Arv]