By Garrett B.
 
Picture number three shows that the exhaust and force pushing on the ground, will help the rocket go in the air. This picture is from NASA.
 
Newton’s second law of motion has to do with how an object will change velocity if a force acts upon it. A force is a push or a pull. Newton’s second law states that if an object experiences a push or a pull it will change its direction and speed. Whichever way you push or pull the object, it will go in that direction. The force is directionally proportional to the acceleration. If you push an object four times as hard it will accelerate four times as much.
The acceleration is inversely or oppositely proportional to the mass of the object. For example if you are pushing one car at 5 miles per hour then you have to push two cars, your acceleration will be half of that which is 2.5 miles per hour. So if you double the mass then the acceleration is halved. Acceleration is the rate of change in velocity of a moving object.