Physics
Physics, 20.08.2019 00:00, Firdaus17f

Two identical small balls of equal charge q & equal mass m = 0.9 kg are placed at a separation of r= 1 min
air on a rough surface. if coefficient of static friction is u.= 0.9. find the magnitude of maximum charge q such
that both balls remain at rest.
(1) + 30 uc
(2) 90 uc
(3) + 60 uc
(4) +20 uc​

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