motion and forces unit Flashcards
Distance
motion of an object is to describe how far it has moved
speed
is the distance an object travels per unit of time
Displacement
distance and direction of an objects change in position from the starting point
Average Speed
Is the total distance traveled divided by the total time of travel
Instantaneous speed
The speed given at a point in time
velocity
includes the speed of an object and the direction of its motion
acceleration
the rate of velocity change
force
A push or a pull
Net force
When two or more forces act on an object at the same time
Balanced Forces
Forces on an object that are equal in size and opposite in direction
Inertia
The tendency of an object to resist any change in its motion
Newtons Second Law of Motion
The acceleration of an object is in the same direction as the net force on the object
Friction
is the force that opposes the sliding motion of two surfaces
Static friction
is the frictional force that prevents two surfaces from sliding past each other
sliding friction
is the force that opposes the motion of two surfaces sliding past each other
air resistance
opposes the motion of objects that move through the air
Gravity
is an attractive force between any two objects that depends on the masses of the objects and distance between them
weight
the gravitational force exerted on an object
centripetal acceleration
acceleration toward the center of a curved or circular path
centripetal force
The net force exerted toward the center of a curved path
Newtons Third Law Of Motion
Describes the action reaction of pairs this way
momentum
is the product of its mass and velocity
