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Shane Macguire Grade: upto college level
        At what separation should two equal charge, 1.0 C each, be placed so that the force between them equals the weight of a 50 kg person?
3 years ago

Deepak Patra
474 Points
										Sol. q = 1 C, Let the distance be x
F = 50 * 9.8 = 490
F = kq^2/x^2 ⇒ 460 = 9 * 10^9 * 1^2/x^2 or x^2 = 9 * 10^9/490 = 18.36 * 10^6
⇒ x = 4.29 * 10^3 m


3 years ago
Apoorva Arora
IIT Roorkee
181 Points
										a 50 kg person exerts the force, F=mg=500 newtons assuming g=10 m/s(square).So,$F=500= 9\times 10^{9}\times 1\times 1/r^{2}$$r^{2}=18\times 10^{6}$so $r\approx 4.24\times 10^{3}metres$nearly 4.24 kilometresThanks and RegardsApoorva AroraIIT RoorkeeaskIITians Faculty

3 years ago
Apoorva Arora
IIT Roorkee
181 Points
										 a 50 kg person exerts the force, F=mg=500 newtons assuming g=10 m/s(square).So,so nearly 4.24 kilometresThanks and RegardsApoorva AroraIIT RoorkeeaskIITians Faculty

3 years ago
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