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25 terms

Forces and Motion

These are a set of card I use to study for my science final.
STUDY
PLAY
Acceleration
an increase in speed
Air resistance
the fluid friction experienced by objects falling through the air
Average Speed
Total distance divided by total time
Balanced Forces
equal forces acting on an object in opposite directions
Displacement
the change in position of an object
Force
force into or from an action or state.
Friction
the resistance encountered when one object is moved in contact with another
Instantaneous Speed
the speed of an object at one instant of time
Net Force
the combination of all forces acting on an object
Sliding Friction
friction that occurs when one surface slides over another
Speed
distance travelled per unit time
Static Friction
the friction that acts on objects that are not moving
Unbalanced Forces
Forces that produce a nonzero net force, which changes an object's motion
Vector
a variable quantity that can be resolved into components
Velocity
speed in a given direction
Centripetal Acceleration
acceleration toward the center of a curved or circular path
Centripetal Force
the inward force on a body moving in a curved path around another body
First Law of Motion
An object in motion will stay in motion unless it is acted upon by an outside force.
Gravity
The force of attraction between all masses in the universe.
Inertia
the tendency of an object to resist any change in its motion
Law of Conservation of Momentum
the rule that the total momentum of objects in an interaction does not change
Momentum
an impelling force or strength
Second Law of Motion
the rate of change of momentum is proportional to the imposed force and goes in the direction of the force
Third Law of Motion
action and reaction.
Weight
a system of units used to express how heavy something is.