Static Friction

weight of block in newtons W

40

coefficient of static friction

µ

s

0.2

to start moving: F =

f

s

=

µ

s

F

N

F

N

= W

F =

µ

s

W

F = 0.2 × 40

F = 8.

Static friction is the force between two objects that are not moving relative to one another. This Demonstration shows what applied force

F

is needed to overcome this static friction (and thus begin moving). You can change the weight of the object or the coefficient of static friction.