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Question

# A particle moves along the x- axis from x=0 to x=5 m under the influence of a force given by F=7−2x+3x2.Work done in the process is 7027035135

A
35
B
270
C
135
D
70
Solution
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#### w=∫Fdx=∫507−2x+3x2dx=[7x−2x22+3x23]50=[7x−x2+x3]50=[7×5−52+53]−[0−0+0]=[35−25+125]−0=135JIn this question, answer is 135 J not 70J

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