Newton's second laws
Gravity x mass equals
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
To resist a change in motion
Inertia
what force opposes the motion of objects that touch as they pass by each other
friction
Mass x acceleration is the formula for....
Force
forces that are equal and opposite
balanced
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
Hand pushes on wall and __________________
wall pushes on hand
what are the four types of frictions
static, sliding, rolling and fluid
An object in free fall has an acceleration of
9.8 m/s2
When an unbalanced force acts on an object; the object _____________
accelerates
The acceleration of an object is directly proportional to the net force acting on it
Newton's 2 law
Wearing a seat belt in a car accident is an example of what law
Newton's 1st law
True or False: Air resistance is a fluid friction
True
If the mass increases, the acceleration _________
decreases
The sum of all forces acting on an object equals the
net force
Which scientist did Newton study before writing his laws?
Galileo
An object with a lot of inertia is likely to do what
continue its motion
Which type of friction acts on a non moving object
static friction
The greater the force results in the _______________ the acceleration
greater
The net force of zero is a
balanced force
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
True or False: Some action and reaction forces do not cancel out
True