1. What are the relationships between forces and motion? F*M=AF=M*A 
Newtons first law: An object at rest will stay at rest unless another object is acted upon it.

2. What are the variables that affect motion and force? It is affected by the initial speed and acceleration and the most important is gravity, air friction, surface friction. All of these forces are proportional to the mass of an object.

3. How does Newton’s three laws describe the motion of a moving object? 

4. How does gravity impact objects?
The formula for gravity is G= 9.8 m/s. 
Gravitational pull is G*m1*m2/r^2 
If the object is big then the gravitational pull will be stronger than if there were too small objects.

Credit:

http://www.grc.nasa.gov/WWW/k-12/airplane/newton1.html

http://exploration.grc.nasa.gov/education/rocket/newton2r.html

https://www.grc.nasa.gov/WWW/Wright/airplane/newton3.html