Newton's second laws
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/unbalanced 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's movement 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 2 law
An object that is still will only change if acted upon by what
net force
Is are resistance a fluid friction?
Yes
The speed at which something would pulled down in free fall close to earth's surface
9.8 m/s 2
What happens if the net force is any nonzero number
The object will accelerate negatively or positively
Which scientist did Newton study before writing his laws?
Galileo
An object with a lot of inertia is likely to do what
Resist change in movement
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 of motion did Newton write?
three
A skydiver who jumps from a plane will fall through the air with gravity as the only force acting on them. This is called:
free fall
What is the fastest an object can fall called
Terminal Velocity