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PhysicsW.E.P.MiscellaneousEasy2 minPYQ_2020
PhysicsEasysingle choice

A particle of massmmoves along the quarter section of the circular path whose centre is at the origin. The radius of the circular path isa. A forceF→=yi^-xj^ Nacts on the particle wherex,ydenote the coordinates of the position of the particle. Calculate the work done by this force, in taking the particle from pointA (a,0)to pointB (0, a),along the circular path.

Options:

Answer:
D
Solution:

The given tangential force opposite to the motion

F¯t=x2+y2=a

w=∫Ftdscos180o-a∫ds=-a.πa2=-πa22 J

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

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