Physics

Problem

Take the mean distance of the moon and the sun from the earth to be

0.4 \times 10^6

km and

150 \times 10^6

km respectively. Their masses are

8 \times 10^{22}

kg and

2 \times 10^{30}

kg respectively. The radius of the earth is 6400 km. Let

\Delta F_1

be the difference in the forces exerted by the moon at the nearest and farthest points on the earth and

\Delta F_2

be the difference in the force exerted by the sun at the nearest and farthest points on the earth. Then, the number closest to

\frac{\Delta F_1}{\Delta F_2}

is: a. 2 b. 6 c.

10^{-2}

d. 0.6