A force F = (81-2j)N acts on a particle that undergoes a displacement Ar = (4i...

Question

Question

Answer 1

Answer #1

$W=\int\bold{F}.d\bold{r}$

For a constant force , this becomes $W=\bold{F}.\bold{\Delta r}$

$W=\bold{F}.\bold{\Delta r}=F_{x}\Delta r_{x}+ F_{y}\Delta r_{y}=(8)(4)+(-2)(2)=28 J$

Answer 2

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