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Sagot :
The variation is a joint variation, and the equation that relates the three independent variables is [tex]s = 0.18\frac{rf}{b}[/tex]
How to determine the equation in terms of the variables?
The direct and the inverse variations from the question can be represented using:
[tex]s = k\frac{rf}{b}[/tex]
Where:
- s represents the speed; s = 10
- k represents the constant of variation
- r represents the number of revolutions per minute
- f represents the number of front sprocket teeth
- b represents the number of back sprocket teeth
From the question, we have:
r = 40; f = 39; b = 28
So, we have:
[tex]s = k\frac{rf}{b}[/tex]
[tex]10 = k\frac{40 * 39}{28}[/tex]
Make k the subject
[tex]k = \frac{10 * 28}{40 * 39}[/tex]
Evaluate
k = 0.18
Substitute k = 0.18 in [tex]s = k\frac{rf}{b}[/tex]
[tex]s = 0.18\frac{rf}{b}[/tex]
Hence, the equation that relates the three independent variables is [tex]s = 0.18\frac{rf}{b}[/tex]
Read more about variation at:
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