Apex Learning -Courses ic/activity/3/1/4/assessment arn Math: A Com. G Google A Redirecting... G M Mail G Images Wrigley.com :: Orbit. L 3.1.4 Quiz: Noncontact Forces Question 7 of 10 Coulomb's law describes how the charge on and distance between two particles affect the electric force between them. Which situation will result in the two particles being repelled by each other? O A. Both particles having a negative charge O B. One particle having a positive charge and the other a negative charge O C. Decreasing the distance between them D. Increasing the distance between them PREVIOUS

12:38 p.m. @ 79% A brightspace.ucd.ie Est. Length: 3:00:00 Laura Fleming: Attempt 1 The figure below shows the spatial distribution of three charged particles in 2D, with d=1 km. What is the net electrostatic force on particle 3 due to the other two charges? Q3=10 d d. Q2=10 Q2=-1C OON O (3. 2 × 103 N; 5. 8 × 10° N) O(-3 2 × 10³ N: 5.8 × 103

SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question 1) There is a 5.0 uC charge at each of 3 comers of a square (each side 70. mm long). What is the force on +6.0 µC placed at the center of the square? 1) 2) How far apart should two protons be if the electrical force of repulsion is equal to the weight (attraction to the Earth) of one of the protons? 2) FIGURE 15-6 2.5m 2.5m 0.5m 3) Two volleyballs, each of mass 0.300 kg, are charged by an electrostatic generator. Each is 3) attached to an identical string and suspended from the same point, as shown in Fig. 15-6. They repel each other and hang with separation 50.0 cm. The length of the string from the point of support to the center of a ball is 250. cm. Determine the charge on each ball. 4) Charge +2q is placed at the origin and charge -q is placed at x = 2a. Where can a third positive charge +q be placed so that the force on it is zero?

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3) Skid Infinite Black Pit Mitch Skid of 40 kg and Mitch of 60 kg are standing on ice on opposite sides of an infinite black pit. They are each carrying neutral massless spheres while standing 8 m apart. Suppose that 3.0 x 10¹5 electrons are removed from one sphere and placed on the other. (a) Calculate the magnitude of the electrostatic force on each sphere. Are the forces the same or different? Explain. (b) Calculate the magnitude of the accelerations for Skid and Mitch at the moment they are 8 m apart. Are they the same or different? Explain. (c) As Skid and Mitch move closer together do their accelerations increase, decrease, or remain the same? Explain.

Question 1 Point load qi=q3=5 uC, q2=- 2 and a = 0.10 m placed at the question corners of the road in the figure 1. one. Find to cause q3 charge. k = 9 109 sin45°=cos45°=0.7 (N+m2 ca-). b. To show the resultant strength, direction and possession.   Question 2 As seen in the figure, the q = 2 charge is at the origin, and the q2=-6 charge is at (0:3)m. a. Find the total electrical potential created by these charges (4:0) at point P at m. b. Find the change in potential energy of a 3 uC charge brought from infinity to point P. = 9 * 10° (N-m- с2 Question 3 a. Explain the connection of capacitances (capacitors). b. Find the equivalent capacitance between points a and b in the circuit in the figure. Capacities are in p.F. If Vab=100 Volts, calculate the total energy stored.

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Title: Section 1 Description General 4.The diagram of the electric field surrounding the thumbtack is shown below if it is positively charged. O 1. True O 2 False Previous Next

011 (part 1 of 2) Three charges are arranged as shown in the figure. 2.2 nC -0.7 nC 3.1 m -1.5 m O 0.49 nC Find the magnitude of the electro- static force on the charge at the origin. The value of the Coulomb constant is 8.98755 x 10° N - m²/C². Answer in units of nN. 012 (part 2 of 2) What is the angle 0 between the electrostatic force on the charge at the origin and the pos- itive r-axis? Answer in degrees as an angle between -180° and 180° measured from the positive r-axis, with counterclockwise posi- tive. Answer in units of °.