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Question

A water jet strikes a vertical wall elastically at angle θ with the horizontal. The cross sectional area of the pipe is A, density of water is D and the speed of water jet is v. the normal force acting on the wall is

A
DAvcosθ
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B
DAv2cosθ
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C
2DAvcosθ
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D
2DAv2cosθ
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Solution

The correct option is B DAv2cosθ
Normal force is force to wall
So, Normal= DAv2cosθ
Hence,
option (B) is correct answer.

1220474_1311637_ans_abbc39856de34025a0233d8be3eb2057.JPG

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