Andy is entering early adolescence. although he used to be a big help to his mother by doing household chores, he now refuses, s
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- initial velocity=u=20km/h=5.5m/s
- Acceleration=a=8m/s^2
- Time=t=10s
The radius of the sphere is r=5.15 cm=0.0515 m, and its surface is given by
So the total charge on the surface of the sphere is, using the charge density
:
The electrostatic force between the sphere and the point charge is:
where
ke is the Coulomb's constant
Q is the charge on the sphere
is the point charge
r is their separation
Re-arranging the equation, we can find the separation between the sphere and the point charge:
So the total charge on the surface of the sphere is, using the charge density
The electrostatic force between the sphere and the point charge is:
where
ke is the Coulomb's constant
Q is the charge on the sphere
r is their separation
Re-arranging the equation, we can find the separation between the sphere and the point charge: