Gravity Presentation Gravity Definition: the force that attracts a body toward the center of the Earth or toward any other physical body having mass Type of Force: - Contact Force (eg. friction force, normal force, spring force) Non-Contact Force (magnetic force, gravitational force, electrostatic force) Importance of Gravity on Earth Examples: - Keeps Earth in orbit around the sun - Holds down our atmosphere and air we need to breathe - Holds us down to the ground - Keeps food in plates and drinks in cups Factors Affecting the Gravitational Force Between Objects Two Factors: - - Size: The size of an object affects how much gravitational pull it has, the greater the size, the greater gravity force Distance: The distance of between the objects affects the strength of the pull, the closer the object, the greater the gravity force How the Masses of Objects Affect the Gravitational Force Between Them - - This table provides us two different objects and their gravitational force at different weights Our headings are “Mass of Object 1”, “Mass of Object 2”, and “Gravitational Force”, the objects are measured in Kilograms and the force in Newtons The date is written in scientific notation to simplify the extremely large numbers being shown If we look at the data we see a trend that as the table progresses the mass of the objects increase As the weight of the objects increase, so does their gravitational force, their relationship is that the gravitational force is dependent on the mass of the objects. Summary - Gravity is the force that a planet or body used to draw other objects towards its center - Without gravity we wouldn’t be able to do everyday things or even live - Mass of an object and the distance between objects affects the gravitational force they have - The higher the masses of objects, the higher the gravitational force between them - The closer the distance between objects, the higher the gravitational force between them
