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Question

The F−x graph is shown below. Find the change in potential energy from x=0 to x=5 m

A
50 J
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B
25 J
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C
35 J
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D
10 J
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Solution

The correct option is B 25 J
We know that, If the potential energy function U(x) is known, then the force at any position can be obtained by taking the derivative of the potential energy

F= dU dx

21F dx=21 dU

U1U2= Area under Fx curve
U1U2=12×10×5=25 J

Hence option B is the correct answer

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