Q2/ A car wheel is supposed to be travelling at a speed of 80 mile per hour in theair. A scaled model (1:4) is tested in water instead of air and is supposed to havedynamic similarity. a) Determine the model speed in water b) then find the forceratio of the model to prototype if you know that: (pair = 1.22 kg/m³, µair = 1.78 x 10-5 N.s/m?, Pwater998 kg/m², µwater= 0.001 N.s/m²).

Givenspeed of prototype V=80mile/hrscale ratio Lr=D1D2=14dynamic symilarity

Q2/ A car wheel is supposed to be travelling at a speed of 80 mile per hou air. A scaled model (1:4) is tested in water instead of air and is supposed dynamic similarity. a) Determine the model speed in water b) then find ti ratio of the model to prototype if you know that: (pair = 1.22 kg/m², µair = 1. %3D %3D

Q2/ A car wheel is supposed to be travelling at a speed of 80 mile per hou air. A scaled model (1:4) is tested in water instead of air and is supposed dynamic similarity. a) Determine the model speed in water b) then find ti ratio of the model to prototype if you know that: (pair = 1.22 kg/m², µair = 1. %3D %3D

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

Q2/ A car wheel is supposed to be travelling at a speed of 80 mile per hour in the
air. A scaled model (1:4) is tested in water instead of air and is supposed to have
dynamic similarity. a) Determine the model speed in water b) then find the force
ratio of the model to prototype if you know that: (pair = 1.22 kg/m³, µair = 1.78 x 10-
5 N.s/m?, Pwater
998 kg/m², µwater
= 0.001 N.s/m²).

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