Question

Using the formula for gravity,

FG = (G • m1 • m2) / d2

Show that the force of gravity on a 1-kg mass at Earth’s surface is 9.8 N.
(The mass of Earth is 6 x 1024 kg, and its radius is 6.4 x 106 m.)

Answer 1

see below

Step-by-step explanation:

G = gravitational constant = 6.6743 x 10^-11 m^3 / (kg s)

So the equation becomes:

Fg = 6.6743 x 10^-11 * 1 * 6 x10^24 / (6.4 x 10^6)^2 = 9.776 N = ~ 9.8 N