Question

If the force 2i^-j^+10k^ is subjected to a body displaces according to the law i^+j^+k^ ,find the work done by the force on the body .

Answer 1

Work done is a scelar quantity.

So we use dot product

W.D = F . D = (2i-j+10k) . (i+j+k) = 2-1+10= 11J

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