Problem 19.94 Two small plastic balls hang from threads of negligible mass. Each
ID: 2280912 • Letter: P
Question
Problem 19.94 Two small plastic balls hang from threads of negligible mass. Each ball has a mass of 0.190g and a charge of magnitude q. The balls are attracted to each other, and the threads attached to the balls make an angle of 20.0 ? with the vertical, as shown in the figure.(Figure 1) Problem 19.94 Two small plastic balls hang from threads of negligible mass. Each ball has a mass of 0.190g and a charge of magnitude q. The balls are attracted to each other, and the threads attached to the balls make an angle of 20.0 ? with the vertical, as shown in the figure.(Figure 1) Two small plastic balls hang from threads of negligible mass. Each ball has a mass of 0.190g and a charge of magnitude q. The balls are attracted to each other, and the threads attached to the balls make an angle of 20.0 ? with the vertical, as shown in the figure.(Figure 1) Two small plastic balls hang from threads of negligible mass. Each ball has a mass of 0.190g and a charge of magnitude q. The balls are attracted to each other, and the threads attached to the balls make an angle of 20.0 ? with the vertical, as shown in the figure.(Figure 1) Part A Find the magnitude of the electric force acting on each ball. F =N Part B Find the tension in each of the threads. T =
N Part C Find the magnitude of the charge on the balls. q =
nC
Part A Find the magnitude of the electric force acting on each ball. F =
N Part B Find the tension in each of the threads. T =
N Part C Find the magnitude of the charge on the balls. q =
nC
Part A Find the magnitude of the electric force acting on each ball. F =
N Part B Find the tension in each of the threads. T =
N Part C Find the magnitude of the charge on the balls. q =
nC
Part A Find the magnitude of the electric force acting on each ball. F =
N Part B Find the tension in each of the threads. T =
N Part C Find the magnitude of the charge on the balls. q =
nC
Part A Find the magnitude of the electric force acting on each ball. F =
N Part A Find the magnitude of the electric force acting on each ball. F =
N F =
N F =
N Part B Find the tension in each of the threads. T =
N Part B Find the tension in each of the threads. T =
N T =
N T =
N Part C Find the magnitude of the charge on the balls. q =
nC
Part C Find the magnitude of the charge on the balls. q =
nC
q =
nC q =
nC of 1 Problem 19.94 Two small plastic balls hang from threads of negligible mass. Each ball has a mass of 0.190g and a charge of magnitude q. The balls are attracted to each other, and the threads attached to the balls make an angle of 20.0 ? with the vertical, as shown in the figure.(Figure 1) Part A Find the magnitude of the electric force acting on each ball. F =
N Part B Find the tension in each of the threads. T =
N Part C Find the magnitude of the charge on the balls. q =
nC
of 1
Explanation / Answer
T cos(20) = mg
T = 0.19*9.8*10^-3*sec(20 deg)
=1.981*10^-3 N
Fele = Tsin(20)
=1.981*10^-3*sin(20 deg)
=0.677*10^-3 N
b) T = 1.981*10^-3 N
c) Kqq/r^2 = 0.667*10^-3
q = sqrt(0.667*10^-3*0.0205^2/(9*10^9))
= 5.58e-9 C
= 5.58 nC