A person is using a rope to lower a $7\mathrm{.}0-N$ bucket into a well with a constant speed of $2\mathrm{.}5\frac{m}{s}.$ What is the magnitude of the force exerted by the rope on the person?

A$.17\mathrm{.}5$ N

B$.2\mathrm{.}5$ N

C$.5\mathrm{.}0$ N

D$.7\mathrm{.}0$ N

E$.69$ N