Two Electrons Repel Each Other with a Force That Varies $k$

question 67

Multiple Choice

Two electrons repel each other with a force that varies inversely as the square of the distance between them, where $k$ is the constant of proportionality. One electron is fixed at the point $( 2,2 )$ . Find the work done in moving the second electron from $( - 4,2 )$ to $( 1,2 )$ .

• A) \(\frac { 215 k } { 3 }\) units of work
• B) \(\frac { 35 k } { 36 }\) units of work
• C) \(\frac { k } { 5 }\) units of work
• D) \(\frac { 5 k } { 6 }\) units of work
• E) \(\frac { k } { 10 }\) units of work

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