1st five
The starting point you choose to describe the location, or position, of an object.
reference point
A push or a pull on an object.
force
An object at rest will stay at rest, and an object in motion will stay in motion unless a force acts on the object.
Newton’s first law of motion
The speed and the direction of a moving object.
velocity
the gravitational force exerted on an object.
weight
An object’s distance and direction from a reference point.
position
A push or a pull on one object by another object that is touching it.
contact force
Law that states that the acceleration of an object is equal to the net force exerted on the object divided by the object’s mass.
Newton’s second law of motion
A quantity that has both magnitude and direction.
vector
An attractive force that exists between all objects that have mass.
gravity
the process of changing position.
motion
The combination of all the forces acting on an object.
net force
When an object applies a force on another object, the second object applies a force of the same strength on the first object but the force is in the opposite direction.
Newton’s third law of motion
A measure of the change in velocity during a period of time.
acceleration
When colliding objects bounce off each other.
elastic collision
a measure of the distance an object travels in a given amount of time.
speed
The force that pushes perpendicular to the object’s surface.
normal force
Law that states that the acceleration of an object is equal to the net force exerted on the object divided by the object’s mass.
Newton’s second law of motion
Contact force that resists the sliding motion of two surfaces that are touching.
friction
The forces two objects apply to each other.
force pair
The difference between the initial, or starting, position and the final position.
displacement
A force that one object applies to another object without touching it.
noncontact force
An object at rest will stay at rest, and an object in motion will stay in motion unless a force acts on the object.
Newton’s first law of motion
A simple model to understand what will happen to an object due to a force.
free-body diagram
A region of space that has a physical quantity (such as a force) at every point.
field