Our Data............

What is Gravity?

Gravity is a force pulling together all matter. The more matter is, the more gravity it takes. Gravity is depending to mass. There are two forces in nature that we experience every day: gravity and magnetism. You may have magnets on your refrigerator, and you know that a magnet will attract a refrigerator with a certain amount of force. The force depends on the strength of the magnet and the distance between the magnet and the metal. You also know that magnets have two poles -- north and south. Either pole will attract iron or steel equally well; north will attract south, and like poles will repel one another. Gravity is the other common force. Newton was the first person to study it seriously, and he came up with the law of universal gravitation:

Each particle of matter attracts every other particle with a force which is directly proportional to t al to the square of the distance between them. His product of their masses and inversely proportion


The standard formula for gravity is:

Gravitational force = (G * m1 * m2) / (d2)

Procedure

1. First, we have quarter and feather.
2. Second, we will measure how high is it and we will test out how fast the quarter it fall down
-Fall at 10cm
-Fall at 30cm
-Fall at 60cm
-Fall at 100cm
-Fall at 220cm
3. Third, we will write down the times and speeds that falls down.

Material

We need........

- Feather

- Quarter
- Measure Tape
- Time Watch

Our Hypothesis

We think quarter and feather can't fall in the speed, because quarter is heavy than feather.

What is Motion?

Motion is a continuous changes in the location of a body. Change in motion is the result of appliced force. First law of motion is an object in motion continues in motion and an object at rest remains at rest unless acted upon by a force. Alson called the law of inertia. The second law of motion is the acceleration of an object is directly proportional to force appliced to it and inversely proportional to its mass. The third law of motion is for every action, there is an equal and opposite reaction. Also called the law of action and reaction. Momentum is the total amount of motion of an object.The law of conversation of momentum is any object or system of object remains constant, as long as no outside force acts upon the object or system. An object's momentum is directly related to the object's mass and velocity and is conserved within system, as described by the law of conservation of momentum.