Gravitational force is given by, 
Where, m and M are the masses of the objects, R is the distance between them and G gravitational constant.
Gravitational force of the star on planet 1, 
Gravitational force of the star on planet 2, 
Ratio, 

Therefore, the gravitational force of the star on the planet 1 is three times that on planet 2.
What is the definition of newton
The average speed of the football is 15 meters per second. Just divide both of the numbers by 4 :)
Answer is 4,400,000 kg • m/s