Asmall glass bead has been charged to +20 nc. a small metal ball bearing 1.0 cm above the bead feels a 0.018 n downward electric force. what is the charge on the ball bearing?

Explanation:

Let the charge on the ball bearing is q.

charge on glass bead, Q = 20 nC = 20 x 10^-9 C

Force between them, F = 0.018 N

Distance between them, d = 1 cm = 0.01 m

By use of Coulomb's law in electrostatics

By substituting the values

Thus, the charge on the ball bearing is

not moving. pos accel,

b.a device that inputs heat into a cool object