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