Solve the problem.
-A force acts on a certain object in such a way that when the object has moved a distance of $r$ (in $\mathrm{m}$ ), the force $\mathrm{f}$ (in newtons) is given by $\mathrm{f}=3 \mathrm{r}^{2}+2 \mathrm{r}$. Find the work (in joules) done through the first four meters.
A) $66 \mathrm{~J}$
B) $64 \mathrm{~J}$
C) $40 \mathrm{~J}$
D) $80 \mathrm{~J}$

Question

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The Answer of Solve the problem.
-A force acts on a certain object in such a way that when the object has moved a distance of $r$ (in $\mathrm{m}$ ), the force $\mathrm{f}$ (in newtons) is given by $\mathrm{f}=3 \mathrm{r}^{2}+2 \mathrm{r}$. Find the work (in joules) done through the first four meters.
A) $66 \mathrm{~J}$
B) $64 \mathrm{~J}$
C) $40 \mathrm{~J}$
D) $80 \mathrm{~J}$

Solve the Problem rrr (In m\mathrm{m}m ), the Force f\mathrm{f}f (In Newtons) Is Given By

Solve the Problem $r$ (In $\mathrm{m}$ ), the Force $\mathrm{f}$ (In Newtons) Is Given By