Beads Of Glass

Beads Of Glass




No items matching your keywords were found.



Making Glass Beads





Beads Of Glass

Two cylindrical glass beads each of mass m = 11.7 mg are set on their flat ends on a horizontal insulating?

surface separated by a distance d = 2.25 cm. The coefficient of static friction between the beads and the surface is μs = 0.183. The beads are then given identical charges (magnitude and sign). What is the minimum charge needed to start the beads moving?

Equate the friction force Ff to the electric force Fe.
Ff = mg*μs = Fe = kq^2/r^2
Then solve for q.
q = sqrt(mg*μs*r^2/k) = sqrt(0.0117*9.81*0.183*0.0225^2 / 8.98755E9) = 3.4396546-08 C.

Beads Of Glass