Newton's Second Law of Motion?

Question

I tried this, believe me. So i am not just doing this to get an answer, i really need help. Here is the question:

mass: State what would go faster or slower because of some change in its mass and how its mass would change or be different.

I am supposed to make an example of newton's second law, and that is the question. Also, I'm only an 8th grader, so don't give me some college answer i can't understand please. lol thanks

Answer 1

Example 1: A baloon. When the air is a balloon escapes the balloon blows all over the place. As it loses air mass, it slows downs till it stops.

Example 2: When a star explodes (goes nova) it throws off his outer layer and the inner core crunches in a spins faster. It lost mass, and spun faster.

Example 3: Apollo space rockets. The rockets use liquid fuel. As the fuel burns up and the expelled as hot gases, the rockets become lighter and can be pushed faster.

Example 4: A car is moving at a constant speed with the roof open. A cement truck comes upon it's side and starts dumping cement, into the car, slowly. The car slows as the cement adds weight to the car.

Answer 2

Newton's second law of motion explains how an object will change velocity if it is pushed or pulled upon.

Firstly, this law states that if you do place a force on an object, it will accelerate, which means to change its velocity (or speed), and it will change its velocity in the direction of the force.

EXAMPLE: If you were to push on a shopping cart; it will change it's speed in the direction you push it (and if you pull it toward you, it will change it's speed in that direction).

Secondly, this acceleration is directly proportional to the force. For example, if you are pushing on an object, causing it to accelerate, and then you push, say, three times harder, the acceleration will be three times greater.

EXAMPLE: You are pushing a kid on a swing (swingset).  The stronger your force to push it, the faster the kid will swing away.

If you push twice as hard, the will swing away twicw as fast.

Thirdly, this acceleration is inversely proportional to the mass of the object. For example, if you are pushing equally on two objects, and one of the objects has five times more mass than the other, it will accelerate at one fifth the acceleration of the other.

EXAMPLE: If you push on a tennis ball and a bowling ball at the same time (with the same amount of force or strength) the item with more mass (the heavier item) which is the bowling ball in our example will move slower.  The difference would be based on a inverse-ratio of the mass, which means, if the bowling ball weighs 20 times MORE than the tennis ball, than it will travel away at a speed 20 times SLOWER than the tennis ball.