A charge is uniformly distributed in a spherical volume of radius
PHYSICS · Subjective · AP · Physics 2: Algebra-based · Electric Force Field and Potential · Electric Force Field and Potential
Problem
A charge +q is uniformly distributed in a spherical volume of radius r. A particle of charge +q and mass m is projected with velocity v0 from the surface of the spherical volume towards its centre through a smooth tunnel dug across the sphere. Find the minimum value of v0 such that it just reaches the centre. Assume that there is no resistance on the particle except electrostatic force.