Two masses are attracting each other with a gravitational force of 99N. What will the force of attraction be of the distance between them triples

Answer 1

To understand this problem, you must know and use Newton's law of universal gravitation:

F_gravity = Gm₁m₂/d² where F_gravity = the forces of gravity, G = the universal gravitation constant which is 6.673 x 10^-11 N m²/kg², m₁ is mass 1, m₂ is mass 2, and d is the distance between the masses m₁ and m₂.

Notice that the d is in the denominator so when d increases, the F_gravity, goes down. Since d is squared, then as d increases, F_gravity goes down by the square of the d. Since d is increasing by 3 times, F_gravity will go down by 3² times or 9 times. So 99/9 = 11 N.