Answer:
F= G m₁m₂/r²
a. F is directly proportional to the masses so any increase in the masses will increase the Force F and vice versa.
b. F is inversely proportional to the square of the distance between the masses so any increase in the distance will decrease the force F and vice versa.
c. G is a gravitational constant and is expressed in Nm²/kg². this will give force in Newtons
Answer:


Step-by-step explanation:
Given
Let
f = Father's age
s = Son's age
We'll solve this question, while reading through the instructions
From the first statement;
f is 2 less than 7 times s.
This means

In two years time, the father will be f +2 and the son will be s + 2
So, their sum is:


Collect like terns


So, the equations are:


280 = 20x + 100
20 * 9 = 180
x = 9
Check you answer :
280 = 20 ( 9 ) + 100
280 = 180 + 100
280 = 280 . True statement
The midpoint of these two numbers is 0.035