8 km is not a speed. And even if it were, we would still need to know how much time Charlie spent running.
A) 10÷8.5
b) 120÷10
c) answer A÷Answer B.
sure on first two, not so sure on C.
The gravitational force exerted on the satellite is called the centrifugal force, the force keeping it orbiting to the planet. Its formula is F= mass times the square of the velocity all over the radius.Thus,
F = 2400 * 6670^2 * (1/8.92x10^6)
F = 11,970 N
I hope I was able to help you. Have a good day.