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Stokes' law
F = 6πηrv
Where: F = force (N), η = viscosity / efficiency, r = radius / distance (m), v = final velocity / speed (m/s)
Solved example
Given: eta = 7, r = 5, v = 10
Find: F (force (N))
- Formula: F = 6·π·η·r·v
- Substitute the values: F = 6·π·10·5·7
- Result: F = 6597.344573 N
Answer: F = 6597.344573 N
Calculator
How to calculate Stokes' law
- Write down the formula: F = 6πηrv.
- Note the known values (η, r, v).
- Substitute them and simplify to find F.
- Use the calculator above to solve for any letter.
Frequently asked questions
What is the formula for Stokes' law?
The formula is F = 6πηrv, where F = force (N), η = viscosity / efficiency, r = radius / distance (m), v = final velocity / speed (m/s).
What is Stokes' law when eta = 7, r = 5, v = 10?
F = 6597.344573 N. Substitute the values into F = 6πηrv and simplify.