Question

The two balls have identical size and masses of 0.20kg each. The pendulum length is 0.80m and there is a 60 degree angle between the cords. The masses have identical charges. What is electric force of one mass on the other? What is the charge on each mass?

Answer #1

Two charged balls are connected by an in extensible
thread of length 3m. Masses of balls are 2kg and 1kg, the charges
are +20micocoulomb and - 100microcoulomb. What minimum constant
external force F must be applied to the ball of mass 1 kg so that
the thread does not slack? Neglect friction and gravity.

1. Two charges are placed between the plates of a parallel plate
capacitor. One charge is +q1 and the other is q2 = +4.66mC
(microC). The charge per unit area on each plate has a magnitude of
sigma = 1.27×10-4C/m2. The force on q1 due to q2 equals the force
on q1 due to the electric field of the parallel plate capacitor.
What is the distance r between the two charges?
2. Two identical small insulating balls are suspended by...

Two identical cork balls, each of mass m, are
hung
from a common point by two insulating threads of negligible
mass, each of length L = 50.0 cm. Each ball has a charge
Q = - 0.2 C distributed uniformly over its volume. The balls
repel each other and assume an equilibrium position as shown. ( 30°
from the center line.)
a) Draw a free-body force diagram for one of the two
masses.
b) Write down ∑Fx = max and...

Two identical small insulating balls are suspended by separate
0.291m threads that are attached to a common point on the ceiling.
Each ball has a mass of 7.90×10-4kg. Initially the balls are
uncharged and hang straight down. They are then given identical
positive charges and, as a result, spread apart with an angle of
35.0o between the threads. Determine the charge on each ball.
This is my third time posting this question :(

Two balls, of masses MA= 40g and MB= 60g are suspended. The
lighter ball is pulled away to a 66 degree angle with the vertical
and released. The two balls stick and move together (collision is
completely inelastic). (length of suspension is 30cm)
1. What is the velocity of the lighter ball just before
impact?
2. What is the velocity of the combined mass after the
collison?
3. What will be the maximum angle reached by the combined mass
(theta...

2. Suppose you have two small pith balls that
are 6.5 cm apart and have equal charges of -27 nC? What is the
magnitude of the repulsive force, in newtons, between the two pith
balls?
3. Suppose you have two point charges each of
72 NC. How many millimeters apart must the two charges be to have a
force of 1.05 N between them?
4. A free electron is suspended in an electric
field near the surface of the Earth....

Three identical balls are arranged so there is one ball at each
corner of an equilateral triangle. Each side of the triangle is
exactly 2 meters long.
(a) If each ball experiences a net force of 3.40 × 10-9
N because of the other two balls, what is the mass of each
ball?
(b) What is the total gravitational potential energy associated
with the interactions between these three balls?

Three identical very dense masses of 7400 kg each are placed on
the x axis. One mass is at x1 = -120 cm , one is at the
origin, and one is at x2 = 450 cm .
a.) What is the magnitude of the net gravitational force Fgrav
on the mass at the origin due to the other two masses?
Take the gravitational constant to be G = 6.67×10−11
N⋅m2/kg2 .
b.) What is the direction of the net...

Three identical very dense masses of 4000 kg each are placed on
the x axis. One mass is at x1 = -100 cm , one is
at the origin, and one is at x2 = 370 cm .
1.What is the magnitude of the net gravitational force
Fgrav on the mass at the origin due to the other two
masses?
Take the gravitational constant to be G =
6.67×10−11 N⋅m2/kg2 .
2.What is the direction of the net gravitational force...

Force per unit of length of a linear distribution of
charge
Two identical uniform line charges with linear density ρ=75nC/m are
located in free space at x=0 and y=±0.4m. What force per unit of
length does each line charge exert on the other? The charges are
parallel to the z axis and are separated by 0.8m

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