A charged dust speck with mass, m = 2.2 g, loses 28 mJ of kinetic energy as it moves aross an electric potential, AV = -118 V. (a) How much work was done on the dust speck? Wnet = mJ (b) What was the change in the dust speck's electric potential energy change, assuming that Wnet = WĘ? AU = mJ (c) Find the charge on the dust speck. Q= μC

Physics for Scientists and Engineers: Foundations and Connections
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Author:Katz, Debora M.
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Chapter26: Electric Potential
Section: Chapter Questions
Problem 24PQ: Two point charges, q1 = 2.0 C and q2 = 2.0 C, are placed on the x axis at x = 1.0 m and x = 1.0 m,...
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A charged dust speck with mass, m = 2.2 g, loses 28 mJ of kinetic energy as it moves aross an electric potential, AV = -118 V.
(a) How much work was done on the dust speck?
Wnet =
mJ
(b) What was the change in the dust speck's electric potential energy change, assuming that Wnet = WĘ?
AU =
(c) Find the charge on the dust speck.
Q=
mJ
μC
(d) What was the dust speck's final kinetic energy if it was initially moving at a speed of 6.18 m/s?
Kf =
J
Vf=
(e) So, how fast was it after crossing the potential differene?
m/s
Transcribed Image Text:A charged dust speck with mass, m = 2.2 g, loses 28 mJ of kinetic energy as it moves aross an electric potential, AV = -118 V. (a) How much work was done on the dust speck? Wnet = mJ (b) What was the change in the dust speck's electric potential energy change, assuming that Wnet = WĘ? AU = (c) Find the charge on the dust speck. Q= mJ μC (d) What was the dust speck's final kinetic energy if it was initially moving at a speed of 6.18 m/s? Kf = J Vf= (e) So, how fast was it after crossing the potential differene? m/s
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