force exam Flashcards
force
“push or pull” may cause an object to slow down, speed up, or change direction
free body diagrams
shows all the forces acting on a object using vectors originating from the center of the object’s mass
contact forces
2 objects must be touching
Ex: push, normal, pull, thrust, tension, friction
field force / action at a distance forces
2 objects DON’T have to be touching
Ex: gravitational, electric, magnetic
newton’s 1st law
object at rest remains in rest, object in motion continues in motion at a constant speed unless acted on by a non-zero net force
what is newton’s 1st law also called?
law of inertia
inertia
property of matter and doesn’t depend on position/location of the objects
equilibrium
when all forces acting on an object are balanced
doesn’t mean forces are equal
balanced forces
the rightward forces are balanced by the leftward forces and the upward forces are balanced by the downward
unbalanced forces
the force applied in one direction is greater than the force applied in the opposite direction
newton’s 2nd law
a net force causes an object to accelerate in the direction of the net force
what is newton’s 2nd law also called
law of acceleration
weight
force due to gravity
changes
mass
anything made up of atoms
doesn’t change
when mass goes up, the acceleration goes…
down
net forces cause…
acceleration
friction
when objects rub against each other
force opposite of motion
friction
newton’s 3rd law
for every action there is an equal force and opposite reaction
what is newton’s 3rd law also called
law of interaction
cause of motion is NOTHING
cause of constant velocity is NOTHING
inertia
reaction force
a force that acts in the opposite direction to an action force
action reaction pair
forces of equal magnitude and opposite direction that act on different object.
zero net force
object is at rest or moving at a constant speed
forces are balanced
