Analysis

Newton's First Law
According to Newton's first law of motion an object at rest will stay at rest and an object that is moving at a constant velocity will continue moving at a constant velocity unless acted upon by an unbalanced force. This law of motion relates right to the balloon car project. A balloon car will stay moving at a constant velocity unless acted upon by an unbalanced force. An example of an unbalanced force in our project would be the lockers in the hallway. Our car did hit the lockers which did cause its velocity to change. According to Newton's first law of motion our balloon car will continue traveling unless acted on by an unbalanced force.

Newton's Second Law
Newton's second law of motion states that the net force on an object is equal to the product of its acceleration and its mass. In other words force equals mass times acceleration. Mass and acceleration are inversely proportional. If we increased the mass in our balloon car the acceleration would then decrease. Looking back on Newton's second law of motion our balloon car's acceleration will be determined on the mass of the car.

Momentum
When the balloon continued to run out of air the car still continued to move. This is because of momentum. The object is the product of its mass and velocity is momentum. In other words momentum equals mass times velocity. As the car moves it builds momentum and when the balloon runs out of air the velocity has increased but the mass has still stayed the same. So therefore the car continues to move because of its momentum.

Action and Reaction
Newton's Third Law states for every action there is an equal and opposite reaction, this law is very true when testing our balloon car. For example, the balloon on top of the balloon car would be object one and the car itself would be object two. When you release the air from object one, or the balloon, the air from that balloon then travels backwards, which makes object two the car go forwards. The air from the balloon pushes out backwards, and this creates the reaction to happen which is the balloon accelerates forwards, because for every action there is an equal or opposite reaction. Another of Newton's Laws relates to this situation, which is Newton's First Law of Motion. Newton's First Law states that things at rest will remain at rest and things in motion will remain at motion unless acted upon by an outside force. In this case of the balloon trial the balloon car will be the object at rest. In the beginning before the trial even begins you place the car down on the ground, this car or object is at rest so it will remain at rest, unless acted upon by an outside force. Once you are ready to release your balloon car, you release the air out of the balloon, the car is no longer at rest because it is acted upon by an outside object, known as air. So in the balloon car trial, a balloon car will remain at rest until an outside force, or the air being released out of the balloon makes the balloon acts upon the object to make it accelerate. Newton's Third Law of motion is a key point, in the testing of balloon cars.

Three Types of Friction
There are three different types of friction  related to the design of the balloon car. The three different types of friction that are related to the balloon car are sliding friction, rolling friction, and liquid friction. Sliding friction is when solid surfaces slide over each other. For example, on the balloon car design that Maddy and I used we had straws over our skewers, and these skewers were attached to our wheels. The sliding friction in our balloon car design was when the car was accelerating the straws would slide back and forth over the skewers. The sliding friction helped to start the car's acceleration, and keep the car accelerated, but it also helped to keep the car moving the last inches when the car reached the stopping point. Rolling friction is when an object rolls over a surface. In this case the balloon car is the object and the surface is the ground that it's traveling on. The rolling friction helps the car accelerate by rolling across the surface which is the ground for a far distance, and then the car will roll little by little when it reaches its final destination point. The last type of friction involved in the design of the balloon car is liquid friction. Liquid friction is friction that occurs when an object moves through a liquid or a gas. The object in this situation in the balloon and the car itself, and the liquid or gas is the air that it's traveling through. The liquid makes it easier for the balloon to travel and accelerate through, but sometimes if the liquid is forcing the car in the opposite direction it can slow down the car, and cause the car to decelerate, or come to a stop. The three types of friction that are related to the balloon car design are sliding friction, rolling friction, and liquid friction.