A physics lab instructor is working on a new demonstration. She attaches two identical conducting balls with mass m = 0.190 g to threads of length L as shown in the figure. There are two strings in the figure. The top of each string is connected to the ceiling, and both strings are connected at the same point. The bottom of each string is connected to a spherical mass labeled m. Both strings have length Land hang at an angle of θto the vertical, with the two strings on opposite sides of the vertical. Both balls have the same charge of 7.60 nC, and are in static equilibrium when θ = 4.55°. What is L (in m)? Assume the threads are massless. Draw a free-body diagram, apply Newton's second law for a particle in equilibrium to one of the balls. Find an equation for the distance between the two balls in terms of L and θ, and use this expression in your Coulomb force equation. m (b) What If? The charge on both balls is increased until each thread makes an angle of θ = 9.10° with the vertical. If both balls have the same electric charge, what is the charge (in nC) on each ball in this case? nC
A physics lab instructor is working on a new demonstration. She attaches two identical conducting balls with mass m = 0.190 g to threads of length L as shown in the figure. There are two strings in the figure. The top of each string is connected to the ceiling, and both strings are connected at the same point. The bottom of each string is connected to a spherical mass labeled m. Both strings have length Land hang at an angle of θto the vertical, with the two strings on opposite sides of the vertical. Both balls have the same charge of 7.60 nC, and are in static equilibrium when θ = 4.55°. What is L (in m)? Assume the threads are massless. Draw a free-body diagram, apply Newton's second law for a particle in equilibrium to one of the balls. Find an equation for the distance between the two balls in terms of L and θ, and use this expression in your Coulomb force equation. m (b) What If? The charge on both balls is increased until each thread makes an angle of θ = 9.10° with the vertical. If both balls have the same electric charge, what is the charge (in nC) on each ball in this case? nC
Chapter12: Sources Of Magnetic Fields
Section: Chapter Questions
Problem 88AP: Two long coaxial copper tubes, each of length L, are connected to a battery of voltage V. The inner...
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A physics lab instructor is working on a new demonstration. She attaches two identical conducting balls with mass
m = 0.190 g
to threads of length L as shown in the figure.There are two strings in the figure. The top of each string is connected to the ceiling, and both strings are connected at the same point. The bottom of each string is connected to a spherical mass labeled m. Both strings have length Land hang at an angle of θto the vertical, with the two strings on opposite sides of the vertical.
Both balls have the same charge of 7.60 nC, and are in static equilibrium when θ = 4.55°. What is L (in m)? Assume the threads are massless.
Draw a free-body diagram, apply Newton's second law for a particle in equilibrium to one of the balls. Find an equation for the distance between the two balls in terms of L and θ, and use this expression in your Coulomb force equation. m
(b)
What If? The charge on both balls is increased until each thread makes an angle of θ = 9.10° with the vertical. If both balls have the same electric charge, what is the charge (in nC) on each ball in this case?
nC
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