Estimating Charge Two hard rubber spheres of mass ~ 15 g are rubbed vigorously w

Question

Estimating Charge Two hard rubber spheres of mass ~15 g are rubbed vigorously with fur on a dry day. They are then suspended from a rod with two insulating strings of length 16 cm. They are observed to hang at equilibrium, 19° from vertical, as shown in Fig. 22-41. Estimate the amount of charge that is found on each sphere.
_________---____-_--------_____________C

PLEASE INCLUDE SPECIFIC DETAILS AND ILLUSTRATIONS TO HELP SOLVING THIS PROBLSO THAT I CAN UNDERSTAND THE IMPORTANCE OF THE CONCEPT TOTHIS TYPE OF PROBLEM. TANK YOU

Explanation / Answer

first to find: distance between the charges. D=3cm+16*sin19*2=13.4(cm). electric force. F=k*q^2/13.4e-2^2. ---- the beads are at equilibrium. so that we have. tan19=F_electric/mg=F/15e-3*g. so F=tan19*15e-3*g=0.051(N). plug this back to equation of F. so q=3.2e-7(C)

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