Gravity & Newton's Second Law
The force of gravity is equal to what
Weight
a push or pull that one body exerts on another
force
For every action there is an equal and opposite reaction force
Newton's third law of motion
what force causes an object to try and not change
Inertia
what force opposes the motion of objects
friction
What is the force called that attracts any two objects
Gravity
forces that are not equal
net force
An object at rest will remain at rest and an object in motion will continue moving at a constant velocity unless acted upon by a net force
Newton's First Law
when the size of an object increase what also increases with it
The object's Inertia
what are the three types of frictions
Rolling, sliding, static
when there are no outside forces acting on an object besides gravity
Free Fall
What happens if the net force acting on an object is zero
The object will not change
The acceleration of an object is directly proportional to the net force acting on it and inversely proportional its mass
Newton's 2nd law
An object that is still will only change if acted upon by what
net force
In addition to air resistance, where else would we find fluid friction?
In the water...anytime an object travels through a fluid such as air or water
The numerical value that is generally accepted for the acceleration due to gravity.
9.8 m/s 2
What happens if the net force is any nonzero number
The object will accelerate
(This can be negative or positive acceleration)
What are all of Newton's Laws Related to?
Motion
An object with a lot of inertia is likely to do what
Resist change
Which type of friction acts on a non moving object
static friction
increases as mass increases and distance decreases
Gravity
How do you calculate Net Force
You find the sum of all forces acting on the object
How many laws did Newton write
three
A car rolling down a hill will keep rolling unless acted upon by a net force what is this an example of
Inertia
What is the fastest an object can fall called
Terminal Velocity