+9 KSAS 2 Three point charges are arranged as shown. A student who just learned Coulomb's law, made the following comment about the net force on the charge in the middle: "Using Coulomb's law, the force due to +Q charge is positive, and the force due to the -Q charge is negative. The forces cancel out, so there will be zero net force on charge q in the middle due to the charges +Q and -Q." Do you agree with the student's comment? Explain.
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KSS
2
Three point charges are arranged as shown. A student who just learned Coulomb's law, made the following comment about the net force on
the charge in the middle:
"Using Coulomb's law, the force due to +Q charge is positive, and the force due to the -Q charge is negative. The forces cancel out, so there
will be zero net force on charge q in the middle due to the charges +Q and -Q."
Do you agree with the student's comment? Explain."
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- Two balloons (m = 0.022 kg) are separated by a distance of d = 12 m. They are released from rest and observed to have an instantaneous acceleration of a = 1.1 m/s2 toward each other at the moment they are released. Assume the two balloons are point charges and have equal but opposite charges. Part (a) Calculate the magnitude of the charge on each balloon in C. Part (b) How many electrons are responsible for the charge, N?A certain lightning bolt moves 40 C of charge. How many fundamental units of charge is this? Think & Prepare: What is the magnitude of the fundamental unit of charge? Answer: ✔fundamental units of chargeThree charges are situated at corners of a rectangle as in the figure below. How much energy would be expended in moving the 8.0 µC charge to infinity?
- Two like charges of the same magnitude are 5.0 mm apart. If the force of repulsion they exert upon each other is 2.0 N, what is the magnitude of each charge? (The value of k is 9.0 * 10^9 N*m^2/C^2) Based on the constant k given, we use Coulomb's law and solve for q, making sure we convert mm to m is because of the k, I believe. (5 mm * m/1000 mm). Please help me step by step to conceptually this problem?Two metal spheres, each of radius 2.6 cm, have a center-to-center separation of 2.8 m. Sphere 1 has a charge of +1.2 × 10-8 C; sphere 2 has a charge of -3.3 x 10-8 C. Assume that the separation is large enough for us to assume that the charge on each sphere is uniformly distributed (the spheres do not affect each other). With V= 0 at infinity, calculate in volts (a) the potential at the point halfway between their centers and the potential on the surface of (b) sphere 1 and (c) sphere 2. (a) Number (b) Number i (c) Number i Units Units UnitsA small metal sphere, carrying a net charge of qt= +7.5 mC, is held in a stationary position by insulating supports. A second small metal sphere, with net charge of 2' +3 mC and mass 2 g is projected toward q . When two spheres are 0.8 m apart, sa is moving toward qt with speed 22.0 mls, see Figure. Assume that the two spheres can be treated as point charges. Neglect the force of gravity. a) What is the speed ofqt when the spheres are 0.5 m apart† How close can q2 approach to q1 ?
- You have a lightweight spring whose unstretched length is 4.0 cm. First, you attach one end of the spring to the ceiling and hang a 2.8 g mass from it. This stretches the spring to a length of 5.1 cm . You then attach two small plastic beads to the opposite ends of the spring, lay the spring on a frictionless table, and give each plastic bead the same charge. This stretches the spring to a length of 4.3 cm . What is the magnitude of the charge (in nC) on each bead?Jwo metal spheres, each of radius 4.2 cm, have a center-to-center separation of 1.9 m. Sphere 1 has a charge of + 1.5 x 10 C; sphere 2 has a charge of - 3.4 x 10 C. Assume that the separation is large enough for us to assume that the charge on each sphere is uniformly distributed (the spheres do not affect each other). With V = 0 at infinity, calçulate in volts (a) the potential at the point halfway between their centers and the potential on the surface of (b) sphere 1 and (c) sphere 2. (a) Number i Units (b) Number i Units (c) Number i Units-q -q +q In which direction will the resultant or net force vector from the two equal negative charges move the negative charge shown in the figure? Note, the angle between the two pairs of positive and negative charges is the same with respected to the dotted horizontal line. Hint: Think about the components of the Coulomb force due to each negative charge. The net force due to both negative charges will move the positive charge to the east. The net force due to both negative charges will move the positive charge to the west. The net force due to both negative charges is 0, so the positive charge remains at rest. The net force due to both negative charges will move the positive charge to the northeast.
- You hold a ruler that has a charge on its tip 4.00 cm above a small piece of tissue paper to see if it can be picked up. The ruler has −10.0 µC of charge. The tissue has 1.00 g of mass. What is the minimum charge required to pick up the tissue paper?three-point charges have equal magnitudes, two being positive and one negative. these charges are fixed to the corners of an equilateral triangle as the drawing shows. the magnitude of each of the charges is 5.5 Uc and the length of the sides of the triangles are 2.5 cm. calculate the magnitude of the net force that each charge experiences. for this question you should have three answers in other words. What is FA, Fb, Fc? Electrons have a charge of q = -1.602 × 10-19 C. A student observes that a Styrofoam cup has a total charge of Q = -0.69 μC. a)Write an expression for the number of excess electrons N in the cup. b) How many excess electrons are in the cup?