A stationary proton is moved from point A, where the potential is 450 V, to point B, where the potential is 125 V. (a) How much work is done by the electric force? (b) What is its speed at point B

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ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
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Chapter1: Units, Trigonometry. And Vectors
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A stationary proton is moved from point A, where the potential is 450 V, to point B, where the potential is 125 V. (a) How much work is done by the electric force? (b) What is its speed at point B?

Sample Problem 2.2
A charge of 6×10-7 C is transferred from infinity to point B. If the work done by the electric force
to do this is 1.2×10-' J, what is the potential at point B?
Given: 9, = 6×10-7 C
W-B = 1.2×10J
Solution:
Using Eq. (2.3),
W
00→B – V. - VB
1.2×10J
6×10 °C
=0- V8
V =-20 V
Practice Exercise 2.2
A stationary proton is moved from point A, where the potential is 450.0 V, to point B, where
the potential is 125 V. (a) How much work is done by the electric force? (b) What is its speed at
point B?
Transcribed Image Text:Sample Problem 2.2 A charge of 6×10-7 C is transferred from infinity to point B. If the work done by the electric force to do this is 1.2×10-' J, what is the potential at point B? Given: 9, = 6×10-7 C W-B = 1.2×10J Solution: Using Eq. (2.3), W 00→B – V. - VB 1.2×10J 6×10 °C =0- V8 V =-20 V Practice Exercise 2.2 A stationary proton is moved from point A, where the potential is 450.0 V, to point B, where the potential is 125 V. (a) How much work is done by the electric force? (b) What is its speed at point B?
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