Class l HW13( Linear momentum) Begin Date: 10/20/2017 12:00:00 AM-Due Date: 10/3

Question

Class l HW13( Linear momentum) Begin Date: 10/20/2017 12:00:00 AM-Due Date: 10/30/2017 11:59:00 PM End Date: 12/14/2017 12:00:00 AM (10%) Problem 5: water from a fire hose is directed horizontally against a wall at a rate of 50.5 kg/s and a speed of 44 ms. A Calculate the magnitude of the force, in newtons, exerted on the wall assuming the water's horizontal momentum is reduced to zero upon impact F= Grade Summary 0% 100% Potential sinO coso cotan)si acosO atan) acotan) sinhO cosh) tanhcotanh( @degrees Radians Submissions Attempts remaining 10 (2% per attempt) detailed view 4 5 6 0 Subenit Hint I give up Hints: 0% action per hat Hants remaning- Feedback: deduction per feedback Submission History Answer Hints Feedback Totals Totals 0% 0% 0% 0

Explanation / Answer

Solution:

Using F = m(v-u) / t where v = final velocity , u = initial velocity , t = time

Now substituting the values,

F = 50.5 ( 0 - 44) / 1

F = -2222 N

As the force will we equal and opposite in this case we can neglect negative sign ,

so F = 2222 N

please comment for Queries.

thanks.

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