- #1

- 39

- 0

## Homework Statement

in this question , Lm / Lp = 1/ 6 ? or Lp / Lm = 1/6 ? Lp = length of prototype , Lm = Length of model

## Homework Equations

## The Attempt at a Solution

i really have no idea... can someone help please?

You are using an out of date browser. It may not display this or other websites correctly.

You should upgrade or use an alternative browser.

You should upgrade or use an alternative browser.

- Thread starter welovephysics
- Start date

- #1

- 39

- 0

in this question , Lm / Lp = 1/ 6 ? or Lp / Lm = 1/6 ? Lp = length of prototype , Lm = Length of model

i really have no idea... can someone help please?

- #2

- 16,804

- 7,574

- #3

- 39

- 0

i am in uni now , and the notes is from my book , IMO , it should be Lp / Lm = 1/6 , am i right ?

can you help ?

- #4

- 39

- 0

IMO , it should be (Vr)( Lr )= (nu)r

nu = kinematic viscosity

since nu is constant , so ,

Vp / Vm = Lm / Lp

60 / Vm = 1/6

so , Vm = 360km/h , am i right ?

thus , force has formula of ρ(L^3)(velocity) , so force is directly proportional to v ,

Fp / Fm = Vp / Vm

Fp / 250 = 60/360 , Fp = 41.7N , is it correct ?

Share: