If you were to choose one, which of earth's spheres is the most important, and why?

if the person is shown to have +90n, then ans is -10n.

if the person is shown to have -90n, then ans is +10n.

the tires are rotating at 0.434 rpmlinear speed=45 m/sdiameter=0.550 mradius=0.275 mnow v= rωω= v/rω=45/0.275ω=163.6 rad/sω=163.6 rad/s (1rev/2π rad) (60s/1m)ω=1563 rpm

the answer is 100. i just did this lesson and got a 100% on it. : )

-fishtank