FORCE AND MOTION REVIEWVocabulary and Formulae

Created by Beverley SuttonPueblo Gardens PreK-8

THE THREE IMPORTANT UNDERSTANDINGS 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.

ACCELERATION

the rate at which velocity changes (this means increases, decreases, or changes direction). Measured in meters per second per second and written as m/s2

ACCELERATION

DECELERATION

negative acceleration; the rate at which velocity decreases

CENTRIPETAL FORCE

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

ENERGY

 the ability of a physical system to do work. 

FORCE

a push or a pull exerted on an object.

FORCE

Force = Mass X Acceleration

Remember force is measured in Newtons, mass in kilograms and acceleration in m/s2

Force (N) = Mass (kg) × Acceleration (m/s2)

FRICTION

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

GRAVITY

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

INERTIA

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). 

MASS

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

MATTER

any substance which has mass and occupies space.  

MOMENTUM

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

MOMENTUM

Momentum = Mass X Velocity

Remember mass is measured in kilograms and velocity in m/s,

so momentum is measured in kg.m/s

MOTION

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

NET FORCE

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

NEWTON

the unit measure of force

OBJECT

a tangible and visible entity

(something you can touch and see).

REFERENCE POINT

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

SPEED

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).

SPEED

Remember that velocity is calculated the same way, but

velocity always includes a direction.

VELOCITY

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

VARIABLE

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

TERMINAL VELOCITY

Since the net force on you is zero, your acceleration will also be zero (Newton's 1st 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.

WEIGHT

the force that gravity exerts upon a body.

SO … REMEMBER …

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.