A charged dust speck with mass, m = 4.1 g, loses 24 mJ of kinetic energy as it moves aross an electric potential, AV = -121 V. (a) How much work was done on the dust speck? Wnet = (b) What was the change in the dust speck's electric potential energy change, assuming that Wnet = WE? AU = mJ Q = mJ (c) Find the charge on the dust speck. μC

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A charged dust speck with mass, m = 4.1 g, loses 24 mJ of kinetic energy as it moves aross an electric potential, AV = -121 V.
(a) How much work was done on the dust speck?
Wnet =
(b) What was the change in the dust speck's electric potential energy change, assuming that Wnet = WE?
AU =
mJ
Q =
(c) Find the charge on the dust speck.
mJ
Vf =
μC
(d) What was the dust speck's final kinetic energy if it was initially moving at a speed of 4.19 m/s?
Kf =
(e) So, how fast was it after crossing the potential differene?
m/s
Transcribed Image Text:A charged dust speck with mass, m = 4.1 g, loses 24 mJ of kinetic energy as it moves aross an electric potential, AV = -121 V. (a) How much work was done on the dust speck? Wnet = (b) What was the change in the dust speck's electric potential energy change, assuming that Wnet = WE? AU = mJ Q = (c) Find the charge on the dust speck. mJ Vf = μC (d) What was the dust speck's final kinetic energy if it was initially moving at a speed of 4.19 m/s? Kf = (e) So, how fast was it after crossing the potential differene? m/s
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