Newton's Laws Of Motion & Forces
Gravity
A force that always attracts or pulls objects toward each other without direct contact or impact
Gravity Force
A force that always attracts or pulls objects toward each other without direct contact or impact
Friction
A force that opposes or slows down motion
what is true about force and acceleration?
A net force acting on an object causes acceleration
Force
A push or a pull resulting from the interaction of an object
Unbalanced Forces
ALWAYS cause a change in motion. They are NOT equal in size, but ARE opposite in direction.
Gravity (definition)
Accelerating force of attraction between any 2 objects in the universe
Newton's Second Law
Acceleration is produced when a force acts on a mass.
Newton's Third Law
Action-Reaction
For every action there is...
An equal and opposite reaction
For a constant force, how does an increase in an object's mass affect its Acceleration?
An increase in the mass will result in a decrease in the acceleration
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 First Law
An object at rest stays at rest until a force causes it to move or An object in motion stays in motion until a force causes it to stop or change direction
Newton's First Law
An object at rest will remain at rest and an object in motion will remain in motion, unless acted on by an unbalanced force. Also called the "Law of inertia"
Momentum
Another name for Newton's 2nd Law of Motion
Unbalanced Net Force
Change in Inertia
Zero net forces
DO NOT cause a change in motion. They are EQUAL in size and ARE opposite in direction.
Balanced forces
Equal forces acting in opposite directions causing no change in motion
Newton's Second Law (formula)
F= m x a
Law of Inertia
First Law of Motion (other name)
Newton's Third Law
For every action, there is an equal and opposite reaction.
Newton's Third Law (LONG)
For every action, there is an equal and opposite reaction.
More momentum while moving
Have larger mass
Less momentum while moving
Have smaller mass
Objects will smaller masses have
Less Inertia
Momentum Formula
Momentum=Mass x Velocity
Objects with larger masses have
More Inertia
The combination of forces acting on an object is known as the
Net force
inertia
Newton's first law of motion is also called the law of
Force is measured in
Newtons (N)
Mass
The amount of matter in an object
Acceleration
The change in speed over time
weight (definition)
The downward force on an object due to gravity.
Describe what causes friction between two solid surfaces.
The friction is due to irregularities in the two surfaces being pressed together. Force is needed to move one material up and over the other or to scrape the irregularities away
Newton's Second law
The larger an objects mass the more force it will take to accelerate or slow down (F = m x a)
Sir Isaac Newton
The man who discovered the Laws of Motion
Inertia
The tendency of an object to resist any change in motion
Inertia (definition)
The tendency of an object to resist any change in motion
Action-Reaction
Third Law of Motion is the law of?
Newtons(N)
This unit can be used to express force
Balanced Forces
Unchanged Inertia
Newtons (N)
Unit of force
equal and opposite
When an action force occurs, the reaction force is always
Balanced force
Zero Force
Force (definition)
a push or pull on an object; measured in Newtons (N)
g = 9.8 m/s/s
acceleration due to gravity
Conservation of momentum
always conserved in collisions
unbalanced forces
applied force is not the same as the net force
Weight
changes with different gravitational forces
Unbalanced forces
forces not equal in size that cause the motion or direction of an object to change
An object dropped in air that experiences no air resistance is said to be in
free fall
A diagram in which all of the forces acting on an object are shown
free-body diagram
The acceleration of an object is directly proportional to the net force acting on it. This means that, as the net force acting on the object increases, the acceleration of the object
increases
Objects with smaller masses have
less inertia
momentum
mass times velocity
terminal velocity
maximum velocity of a falling object
Forces always exist in ..
pairs
mass
remains constant always, everywhere
Newton's First Law Of Motion is also called
the "Law of inertia"
net force
the sum of all forces acing on an object.
What type of force causes acceleration?
unbalanced force
When a hockey puck is struck with a hockey stick, a(n) ? acts on the puck and the puck ?
unbalanced force, accelerates
acceleration (definition)
when an object changes velocity or direction or both
