Law of inertia
Newton's First law of motion
mg
weight
tendency of an object to remain at rest or in uniform, straight-line motion
inertia
F=ma
Newton's second law of motion
Action and reaction
Newton's third law of motion
capable of producing motion or a change in motion
force
SI unit of force
newton
resistance to relative motion
friction
a nonzero vector sum of forces
unbalanced or net force
describes the force of gravity
Newton's law of universal gravitation
a measure of inertia
mass
Mass is related to an object's _____.
all of the preceeding (weight, inertia, density)
What is a possible state of an object in the absence of a net force?
at rest, zero acceleration and constant speed
What term refers to the tendency of an object to remain at rest or in uniform, straight-line motion?
inertia
What is necessary for a change in velocity?
an unbalanced force
According to Newton's second law of motion, when an object is acted upon by an unbalanced force, what can be said about the acceleration?
It is inversely proportional to the object's mass.
A net force _____
can produce motion AND is capable of producing a change in velocity
For every action force, there is _______.
an equal and opposite force
Which is true of the force pair of Newton's third law?
The two forces act on different objects.
Which is true about the acceleration due to gravity?
It decreases with increasing altitude.
What is true about the constant G?
It is very small quantity.
A force is a quantity that is _____ of producing motion or a change in motion.
capable
Forces are ____ quantities.
vector
Galileo concluded that objects _____ (could/could not) remain in motion without a net force.
could
An object will NOT remain at rest or in uniform, straight-line motion if acted upon by a(n) _____ force.
net
The inertia of an object is related to its ____.
mass
According to Newton's second law, an object's acceleration is _____ proportional to its mass.
inversely
The newton unit of force is equal to ____ in standard units.
kg m/s^2
The coefficient of ____ friction is generally greater than the coefficient of _____ friction.
static; kinetic
Newton's third-law force pair acts on ____ objects.
different
The universal gravitational constant is believed to be constant ____.
everywhere