Stoke's Law Flashcards
1
Q
What conditions does Stoke’s Law only work on?
A
- Object is spherical and smooth
- Fluid is uniform throughout
- Flow is Laminar
- Travelling at slow speeds
2
Q
What is the Stoke’s Law equation?
A
Viscous Drag = 6 X PIE X Viscosity of Fluid (n) [kg s-1 m-1] X Radius of Sphere X Velocity of Sphere (v) [m s-1]
3
Q
What is Viscous Drag measured in?
A
Newtons (N)
4
Q
In which direction does Viscous Drag act in?
A
Opposite direction to the spheres velocity.
5
Q
What is it called when Upthrust and Viscous drag acting upwards = the weight of the sphere acting downwards
A
The sphere has reached terminal velocity.
