I SAID don’t copy from internet but u did
Explanation:
Answer:


Explanation:
k = Coulomb constant = 
Q = Charge
r = Distance = 8 cm
R = Radius = 4 cm
Electric field is given by

Volume charge density is given by

The volume charge density for the sphere is 

The magnitude of the electric field is 
Force = mass x acceleration
15 = mass x 4
Mass = 15/4
Mass = 3.75 Kg