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Question

A particle has potential energy dependent on its position on the x axis, represented by the function U(x)=e2x+1 for all real values of x where U(x) and x are given in standard units.
The force it feels at position x=1 is closest to

A
7.39N
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B
8.39N
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C
8.39N
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D
14.8N
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E
14.8N
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Solution

The correct option is E 14.8N
The potential energy of the particle U(x)=e2x+1
Thus force acting on the particle F=d[U(x)]dx=2e2x N
Fx=1=2e2=14.8 N

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