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
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a)
b)
c)
d)
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 bea)
b)
c)
d)
Question ID - 52093 | SaraNextGen Top Answer 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) |
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1 Answer
127 votes
Answer Key / Explanation : (b) -
(b)
Linear momentum of water striking per second to the wall 
, similarly linear momentum of reflected water per second 
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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
Answer Link
127