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Genericcoder
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Hi guys I have 3 question the first one I want to check if my answer is correct or not but the two other question I don't know how to approach them thanks.
1)The 500 gram mass carries a charge of –7 x 10-8 C. If the coefficient of friction between the mass and the surface is 0.20, and an electric field of magnitude 3 x 107 N/C is horizontal and directed to the right, which is being treated as the positive x-direction. What is the acceleration of the mass?
Ff = force of friction;
Ff = 0.2 * (500 * 10^-3) = 10^-1N;
Fe = qE;
Fe = (-7 * 10^-8) * (3 * 10^7) = -2.1N;
Fnet = -2.1 - 10^-1 = -2.2N;
F = ma;
-2.2 / (500 * 10^-3) = a; --> a = -4.4 m/s^2;
I can't find that answer in the multiple question,so did I do something wrong here?
2)What is the magnitude and direction of the electric field generated by a 13 μC charge in a point 8.90 cm away from the charge?
How can I know the electric field generated even though I am not given a point charge ? Thats what confusing me in this question.
3)A +2 μC charge is at the origin. A +5 μC charge is on the x-axis at +1 m. At what point between the charges is the electric field zero?
I first calculated the electric field Electric field from
F = kQ1 * Q2 / d^2.
I got electric field of the 5μC = (9 * 10^4) / 5 and the electric field of the
2μC = (9 * 10^4) /2.
I don't know how to proceed from here to get the distance of the zero electric field.
This is not a homework or anything I am solving some electrostatic problems on my own.
Thanks for the help in advance.
1)The 500 gram mass carries a charge of –7 x 10-8 C. If the coefficient of friction between the mass and the surface is 0.20, and an electric field of magnitude 3 x 107 N/C is horizontal and directed to the right, which is being treated as the positive x-direction. What is the acceleration of the mass?
Ff = force of friction;
Ff = 0.2 * (500 * 10^-3) = 10^-1N;
Fe = qE;
Fe = (-7 * 10^-8) * (3 * 10^7) = -2.1N;
Fnet = -2.1 - 10^-1 = -2.2N;
F = ma;
-2.2 / (500 * 10^-3) = a; --> a = -4.4 m/s^2;
I can't find that answer in the multiple question,so did I do something wrong here?
2)What is the magnitude and direction of the electric field generated by a 13 μC charge in a point 8.90 cm away from the charge?
How can I know the electric field generated even though I am not given a point charge ? Thats what confusing me in this question.
3)A +2 μC charge is at the origin. A +5 μC charge is on the x-axis at +1 m. At what point between the charges is the electric field zero?
I first calculated the electric field Electric field from
F = kQ1 * Q2 / d^2.
I got electric field of the 5μC = (9 * 10^4) / 5 and the electric field of the
2μC = (9 * 10^4) /2.
I don't know how to proceed from here to get the distance of the zero electric field.
This is not a homework or anything I am solving some electrostatic problems on my own.
Thanks for the help in advance.