Sir Issac Newton
...ond law states the acceleration of an object depends on the mass of the object and the amount of force applied. Lastly, his third law states whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first. A football at rest will remain at rest untill a kicker kicks it into the air. Now the football is in motion it will remain in motion untill acted on a unbalanced force like fluid friction or gravity. Newton's First Law of motion also includes inertia. Inertia deals with the tendency of all objects to resist any change in motion. A heavy shopping cart filled with potatoes is harder to push than a less heavy and filled cart because it has more mass. So the more massive an object is the harder it is to push or make accelerate. Also think of a apple and a watermelon. The apple has a mass of 0.102 kg and the watermelon has a ...