Asked by John
Two ping-pong balls each have a mass of (1.4x10^0) g and carry a net charge of (3.99x10^0) μC. One ball is held fixed. At what height should the second ball be placed directly above the fixed ball if it is to remain there?
Answers
Answered by
bobpursley
force gravity=force elec
mg=kqq/r^2
solve for r.
mg=kqq/r^2
solve for r.
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