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9 - Module 10 TEST

TermDefinition
9.8 m/s² acceleration due to gravity on earth
⅙th That of Earth Gravity of the moon compared to Earth
Acceleration The rate at which velocity changes with time
balanced forces forces acting on an object that combine and form a net force of zero
Centripetal Force the force that causes objects to have circular motion
Deceleration negative acceleration
decreases The force of gravity _____________ as the distance between masses increase.
Displacement the change in position of an object
Distance the length of a path between two point
F = m(a) force formula
fluid friction the friction that occurs as an object moves through a fluid
force of gravity; mass of the object What are two things that weight depends on?
force A push or a pull
friction the force that opposes movement between touching surfaces and always acts against the direction of motion.
gravity the force that attracts masses together
inertia matter's resistance to change in motion
instantaneous speed the speed at a certain given moment
Law of Conservation of Momentum states that the total momentum of a group of objects stays the same unless outside forces act on the objects
Magnitude the size of a quantity
mass x acceleration force formula
mass x gravity weight formula
mass x velocity momentum formula
mass the amount of matter in an object
meters (m) distance is measured in
meters per second (m/s) velocity and speed are measured in
meters per second squared (m/s^2) acceleration is measured in
Momentum a measure of how difficult it is to change the inertia of an object.
Motion is an object's change in position relative to a reference point
net force the combination of all the forces acting on an object at the same time
Newton's First Law An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force
Newton's second law states the acceleration of an object is equal to the net force acting on it, divided by the object's mass.
Newton's Third Law For every action force there is an equal and opposite reaction force
p abbreviation for momentum
Reference Point A place or object used for comparison to determine if an object is in motion
rolling friction the friction between surfaces, when an object, such as a wheel or a ball, rolls freely over a surface.
scalar quantity Speed is a ___________.
Scalars quantities that are fully described by a magnitude (or numerical value) alone
second (s) time is measured in
sliding friction friction that occurs when one solid surface slides over another
slows down When the net force is in the opposite direction as the velocity what happens?
Speed the distance something travels in a certain amount of time
Speeding up, slowing down, or changing direction What are the 3 ways to accelerate?
speeds up When the net force (and therefore acceleration) is in the same direction as the velocity what happens?
static friction the force of friction between surfaces not in motion
terminal velocity the speed at which the force of gravity equals air resistance
The mass of the object; the distance between the two objects What are the two things the strength of gravity depends on?
the object is not moving or it is moving at a constant speed in a straight line When will you have a zero acceleration?
unbalanced forces forces acting on an object that combine and form a net force that is not zero
vector quantity Velocity is a ___________.
vector a quantity that has magnitude and direction
Velocity the speed of an object in a particular direction
weight The measurement of the force of gravity on an object that has mass.
Created by: Ms. Greenup
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