A) 2
B) \[2\sqrt{2}\]
C) \[4\sqrt{2}\]
D) 8
Correct Answer: D
Solution :
Force exerted by the falling rain drop on the roof\[=adpv\]where, \[a=\]area of the roof\[d=\]thickness of water layer formed due to rain\[\rho =\]density of water and \[v=\]velocity of rain drops Since, rain falling suddenly increases from 5 mm/h to 20 mm/h, hence d increases to 4 times velocity is also doubled. Hence, becomes\[2v\]. Thus, the pressure\[\left( =\frac{F}{a} \right)\]exerted will become\[4\times 2=8\]times.You need to login to perform this action.
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