A physics lab instructor is working on a new demonstration. She attaches two identical copper balls with mass m = 0.180 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 L and hang at an angle of ? to 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 ? = 4.75°. What is L (in m)? Assume the threads are massless. m (b) What If? The charge on both balls is increased until each thread makes an angle of ? = 9.50° with the vertical. If both balls have the same electric charge, what is the charge (in nC) on each ball in this case?
A physics lab instructor is working on a new demonstration. She attaches two identical copper balls with mass m = 0.180 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 L and hang at an angle of ? to 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 ? = 4.75°. What is L (in m)? Assume the threads are massless. m (b) What If? The charge on both balls is increased until each thread makes an angle of ? = 9.50° with the vertical. If both balls have the same electric charge, what is the charge (in nC) on each ball in this case?
Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter23: Electric Forces
Section: Chapter Questions
Problem 55PQ: Three small metallic spheres with identical mass m and identical charge +q are suspended by light...
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A physics lab instructor is working on a new demonstration. She attaches two identical copper balls with mass
m = 0.180 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 L and hang at an angle of ? to 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 ? = 4.75°. What is L (in m)? Assume the threads are massless.
m
(b)
What If? The charge on both balls is increased until each thread makes an angle of ? = 9.50° with the vertical. If both balls have the same electric charge, what is the charge (in nC) on each ball in this case?
Transcribed Image Text:(a) A physics lab instructor is working on a new demonstration. She attaches two identical copper balls with mass m = 0.180 g to
threads of length L as shown in the figure.
A
Both balls have the same charge of 7.60 nC, and are in static equilibrium when 8 = 4.75°. What is L (in m)? Assume the
threads are massless.
m
(b) What If? The charge on both balls is increased until each thread makes an angle of 8 = 9.50° 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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