1.

A bodyis displacedby 2min Z - direction by a force (-4,2,6)N . Find the work done ……….

Answer»

`- 8 J `
10 J
12 J
4 J

Solution :`W = vec(F) . Vec(d) = ( - 4hat(i) +2 hat(j) +6hat(K)).(2hat(k))`
` = - 4xx0 +2 xx 0 + 6 xx2 `
= 12 J


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