Physics - W.E.P. Question with Solution | TestHub

PhysicsW.E.P.MiscellaneousEasy2 minPYQ_2020
PhysicsEasysingle choice

A variable forceFacts along thex-axis given byF=3x2-2x+1 N. The work done by the force when a particle of mass100 gmoves fromx=50 cmtox=100 cmis

Options:

Answer:
A
Solution:

xinitial=50 cm

xfinal=100 cm

Therefore work done by the variable force,

W=∫xinitialxfinalF.dx

W=∫0.513x2-2x+1dx

W=x3-x2+x0.51

W=1-0.53-1-0.52+1-0.5

W=0.875-0.75+0.5

W=0.625 J

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:W.E.P.Subtopic:Miscellaneous
⏱ 2mℹ️ Source: PYQ_2020

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