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

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

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ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

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Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.

Question

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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