Question

four identical satellites are in orbits around the earth. the radii of their orbits are given in the table. for which satellite is the gravitational pull of earth the strongest?
satellite\ta\tb\tc\td
orbit radius (km)\t1200\t900\t1000\t1100
a. satellite a
b. satellite b
c. satellite c
d. satellite d

Explanation:

Step1: Gravitational force formula

$F = G\frac{Mm}{r^2}$ (G, M, m constant)

Step2: Compare orbit radii

Satellite B has smallest r=900 km

Answer:

B. Satellite B