1.

A force vec(F ) = b( - y hat(i) + x hat( j ))/( x^(2) + y^(2)) N( b is a constant ) acts on a particle as it undergoes counterclockwise circular motion in a circle : x^(2) +y^(2) = 16. The work done by the force when the particle undergoes one complete revolution is ( x,y are in m )

Answer»

0 Joule
`2 pi B` Joule
2b Joule
`4 pi b ` Joule

Answer :B


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