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3 April, 09:54

A small glass bead has been charged to + 30.0 nC. A small metal ball bearing 2.60 cm above the bead feels a 1.80*10-2 N downward electric force. Part A What is the charge on the ball bearing? Express your answer with the appropriate units.

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  1. 3 April, 13:24
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    The charge on the ball bearing 4.507 * 10^-8 C

    Explanation:

    From Coulomb's law

    F = kq1q2/r²

    make q2 the subject

    q2 = Fr²/kq1

    q2 = (1.8*10^-2 * 0.026²) : (9*10^9 * 30*10^-9)

    q2 = 4.507 * 10^-8 C
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