Question

The opposite diagram shows two small planets of mass m each, and one larger planet of mass 4m, aligned and separated by distance d between each other.

Which planet (or planets) is affected by the greatest net gravitational force?

Answer 1

Answer:

c-160

Explanation:

since $\frac{G.M.m}{R^{2} }$=20 N

so the Equation after doubling the the mass of each and object and dividing the radius by 2 (note that the 2 must be also under the power)

so the equation will be $\frac{G.2M.2m}{\frac{1 }{4}R^{2} }$ which equals 8*$\frac{G.M.m}{R^{2} }$, so the force will be 8*20 =160