Vocabulary and Formulae Created by Beverley Sutton Pueblo Gardens PreK-8

 Everything in the universe is in motion.  Force is a push or pull that can result in a change in motion.  There are laws that explain the motion of an object.

 the rate at which velocity changes (this means increases, decreases, or changes direction). Measured in meters per second per second and written as m/s 2

 negative acceleration; the rate at which velocity decreases

 a force that causes an object to move in a circle.

 the ability of a physical system to do work.

 a push or a pull exerted on an object.

Force = Mass X Acceleration Remember force is measured in Newtons, mass in kilograms and acceleration in m/s 2 Force (N) = Mass (kg) × Acceleration (m/s 2 )

 -the force that one surface exerts on another when the two rub against each other.

 the force that pulls all objects in the universe towards each other.

 the tendency of an object at rest to stay at rest; and the tendency of an object in motion to stay in motion (in a straight line).

 a measure of the inertia of an object; the amount of matter in an object

 any substance which has mass and occupies space.

 impetus; a vector; the property of a moving body given by its mass times its velocity (measured in kg.m/s).

Momentum = Mass X Velocity momentum is measured in kg.m/s Remember mass is measured in kilograms and velocity in m/s, so momentum is measured in kg.m/s

 the state in which one object's distance from another (the reference point) is changing.

 the overall force on an object when all the individual forces are added together.

 the unit measure of force

 a tangible and visible entity (something you can touch and see).

 a place or object used for comparison to determine if an object is in motion

 Distance travelled per unit time (speed = distance/time); the rate of change in the position of an object. Measured in meters per second (m/s).

velocity always includes a direction. Remember that velocity is calculated the same way, but velocity always includes a direction.

and direction  the rate and direction of the change in the position of an object.

 something measurable that changes  Independent variable – variable we control  Dependent variable – variable that changes as a DIRECT RESULT of what we do to the independent variable

Since the net force on you is zero, your acceleration will also be zero (Newton's 1 st Law). Now, you are no longer speeding up - you are moving at a constant velocity. This is called your terminal velocity. Unless something happens, this is the velocity that you will have until you hit the ground.

force  the force that gravity exerts upon a body.

 Everything in the universe is in motion.  Force is a push or pull that can result in a change in motion.  There are laws that explain the motion of an object.