The force by which a planet or other body draws objects toward its center.
Balanced Forces
Unbalanced forces
Gravity
Acceleration
Change in speed or direction; rate of change of velocity.
Balanced forces
Acceleration
Gravity
Unbalanced forces
Do not change speed or direction.
unbalanced forces
Balanced forces
acceleration
gravity
Forces that cause a change in the motion of an object.
Inertia
Unbalanced forces
Acceleration
Gravity
A push or pull exerted on an object.
air resistance
force
net force
gravity
Can make an object fall into the ground slower
force
air resistance
Newton's first law
net force (opposite directions)
When two forces act in opposite directions, the net force is the difference between them (subtract)
air resistance
Net force (opposite directions)
gravity
Examples of unbalanced forces
If two (or more) forces act on an object in the same direction, the net force is the sum of the forces (add)
Air resistance
force
Net force (different direction)
Net Force (same direction)
Ball rolling down a hill, car coming to a stop, dominoes falling. What are these an example of?
Newton's second law
unbalanced forces
force
net force (same direction)
Book sitting still on a table, a boat floating, tug of war. What are these examples of?
unbalanced forces
Newton's first law
Balanced forces
gravity
An object at rest stays at rest, and an object in motion stays in motion unless acted upon by an unbalanced force.
Gravity
Force
Newton's First Law
Examples of unbalanced forces
An object's acceleration depends on its mass and on the net force acting on it (F=ma).
Newton's Second Law
Mass
Force
Friction
For every action, there is an equal and opposite reaction.
Gravity
Mass
Newton's Third Law
Friction
The amount of matter in an object.
gravity
Weight
Mass
Newton's third law
The push or pull that opposes motion between two surfaces that are touching each other.
Friction
Newton's First Law
Newton's third law
Weight
