A force F =(5 i +3 j +2 k ) N is applied over a particle which displaces it from its origin to the point r =(2 i - j ) m . The work done on the particle in joules is

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Correct answer: B. +7

Work done, W = F s Here s = r _f- r _i=(2 i - j ) W=(5 i +3 j +2 k )(2 i - j )=10-3=7 ~J

A force F =(5 i +3 j +2 k ) N is applied over a particle which displaces it from its origin to the point r =(2 i - j ) m . The work done on the particle in joules is

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