Studied by 20 people
Balanced Force
forces that cancel each other out when acting together on a single object
Elapsed Time
the time that elapses or passes while an event is occuring
Force
a push or pull exerted by one object on another, causing a change in motion
Friction
a force that opposes the motion of one object moving past another
Unbalanced Force
forces that do not cancel each other out when acting together on a single object
Action Force
the push of one object onto another object
reaction force
the push of a second object back on the first object
Force
a push or pull exerted by one object on another, causing a change in motion
Unbalanced Force
forces that do not cancel each other out when acting together on a single object
Action Force
the push of one object onto another object
reaction force
the push of a second object back on the first object
Balanced Force
forces that cancel each other out when acting together on a single object
REFERENCE POINT OR FRAME OF REFERENCE
Place or object used for comparison to determine if an object is in motion.
SPEED
Distance an object travels in a certain amount of time.
FORMULA FOR SPEED
S = d/t
VELOCITY
Speed in a direction
FORMULA FOR VELOCITY
V = d/t direction
INSTANTANEOUS SPEED
Rate at which an object is moving at a given moment in time
AVERAGE SPEED
Total distance divided by total time
CONSTANT SPEED
Speed that does not change
DISTANCE-TIME GRAPH
Graph with distance on the vertical axis and time on the horizontal axis plus it displays motion of an object over time.
CONSTANT SPEED
Speed that does not change
Adding grease or wheels
decreases friction
force keeping planets it check
gravity
spring scale
instrument used to measure force in newtons
momentum
property of a moving object that equals its mass times its velocity
acceleration
a change in speed either up or down or direction
formula for force
mass x acceleration
Newtons first law
inertia. objects in motion or at rest will stay that way until an outside force is acted upon them
Newton's second law
force is equal to the mass x acceleration. Therefore, things with larger masses or larger accelerations will have more force
Newton's 3rd law
force pairs or for every action there is an equal and opposite reaction
inertia
newtons 1st law
rockets are an example of which law?
Newton's 3rd law
larger objects will have more force is an example of which law?
Newton's 2nd law
air resistance
the friction of air experienced by objects falling through the air
drag
Resistance of the air (or water) against the forward movement of an object
reference point
the starting point you choose to describe the location, or position of an object
position
an objects distance and direction from reference point
motion
the process of changing position
displacement
the difference between the initial, or starting position and the final position
vector
a quantity that has both magnitude and direction
contact force
a push or pull on one object by another that is touching it
free body diagram
a model used to understand what will happen to an object due to force
net force
the combination of all the forces acting on an obect
force pair
the forces two object apply towards one another
normal force
a force that acts on a surface in a direction perpendicular to the surface
elastic collision
a collision between objects that causes them to bounce off one another
field
a region of space that has a physical quantity (like force) at every position
spring scale
tool used to measure force
free body diagram
a diagram showing all the forces acting on an object
flat line on a distance vs time graph shows
motion has stopped
Steep line (on distance time graph)
Object is moving quickly
gradual slope (shallow or gentle slope) on distance vs time graph
object is moving slowly
two things that acceleration depends on
force and mass
If two forces act in opposite directions, how do you determine net force?
subtract the forces
If two forces work in the same direction, how do you determine net force?
add the forces
Net force is greater than zero
object will accelerate in direction of larger force
net force is zero
motion of object will not change
Length of arrow; free body diagrams
shows the magnitude of the force
Note 
Flashcard (95)