Energy
The capacity to do work
Energy
The force of attraction that pulls objects toward each other; the force that controls the motion of our solar system
Gravity
A push or pull that can change the motion of an object, measured in Newton units.
Force
The rate of change of position(or distance) with respect to time units in which speed is measured are expressed as distance per time
Speed
Direction
Energy that is stored in a system or object
Potential energy
The force that pulls two objects toward each other
Gravitational attraction
The symbol for force
Newton
The change in an object's position with respect respect to time and in comparison with the position of other objects used as reference points
Motion
A location to which another location is compared
Reference point
Energy of motion
Kinetic energy
The amount of matter in a body or object
The combination of all of the forces acting on an object
Net force
A force between two surfaces rubbing against each other that works against motion
Friction
The horizontal and vertical lines on a coordinate grid; time is on horizontal, and distance is on vertical.
x and y axis
The motion of a body when only the force of gravity is acting on the body
Free fall
A measure of the gravitational force exerted on an object
Weight
Forces on an object that cause change in the motion of the object
Unbalanced forces
The speed of an object in a particular direction
Velocity
_______ is calculated by dividing the total distance an object traveled by the total time it took the object to travel the distance.
Average Speed
The law that says that every object in the universe attracts every other object, and that the force is affected by mass and distance.
Newton's Law of Universal Gravitation
The path that a body follows as it travels around another body in space
Orbit
The tendency of an object to resist being moved, if the object is moving, to resist a change in speed and direction
Inertia
The rate at which velocity changes over time; changes if its speed, direction, or both changes
Acceleration
This type of graph illustrates changes in motion. Time is graphed on the x-axis and distance is graphed on the y-axis
Distance-Time Graph