Forces and Motion
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Last updated 4:02 PM on 11/17/22
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59 Terms
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Balanced Force
forces that cancel each other out when acting together on a single object
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Elapsed Time
the time that elapses or passes while an event is occuring
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Force
a push or pull exerted by one object on another, causing a change in motion
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Friction
a force that opposes the motion of one object moving past another
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Unbalanced Force
forces that do not cancel each other out when acting together on a single object
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Action Force
the push of one object onto another object
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reaction force
the push of a second object back on the first object
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Force
a push or pull exerted by one object on another, causing a change in motion
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Unbalanced Force
forces that do not cancel each other out when acting together on a single object
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Action Force
the push of one object onto another object
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reaction force
the push of a second object back on the first object
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Balanced Force
forces that cancel each other out when acting together on a single object
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REFERENCE POINT OR FRAME OF REFERENCE
Place or object used for comparison to determine if an object is in motion.
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SPEED
Distance an object travels in a certain amount of time.
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FORMULA FOR SPEED
S = d/t
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VELOCITY
Speed in a direction
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FORMULA FOR VELOCITY
V = d/t direction
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INSTANTANEOUS SPEED
Rate at which an object is moving at a given moment in time
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AVERAGE SPEED
Total distance divided by total time
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CONSTANT SPEED
Speed that does not change
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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.
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CONSTANT SPEED
Speed that does not change
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Adding grease or wheels
decreases friction
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force keeping planets it check
gravity
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spring scale
instrument used to measure force in newtons
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momentum
property of a moving object that equals its mass times its velocity
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acceleration
a change in speed either up or down or direction
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formula for force
mass x acceleration
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Newtons first law
inertia. objects in motion or at rest will stay that way until an outside force is acted upon them
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Newton's second law
force is equal to the mass x acceleration. Therefore, things with larger masses or larger accelerations will have more force
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Newton's 3rd law
force pairs or for every action there is an equal and opposite reaction
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inertia
newtons 1st law
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rockets are an example of which law?
Newton's 3rd law
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larger objects will have more force is an example of which law?
Newton's 2nd law
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air resistance
the friction of air experienced by objects falling through the air
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drag
Resistance of the air (or water) against the forward movement of an object
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reference point
the starting point you choose to describe the location, or position of an object
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position
an objects distance and direction from reference point
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motion
the process of changing position
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displacement
the difference between the initial, or starting position and the final position
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vector
a quantity that has both magnitude and direction
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contact force
a push or pull on one object by another that is touching it
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free body diagram
a model used to understand what will happen to an object due to force
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net force
the combination of all the forces acting on an obect
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force pair
the forces two object apply towards one another
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normal force
a force that acts on a surface in a direction perpendicular to the surface
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elastic collision
a collision between objects that causes them to bounce off one another
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field
a region of space that has a physical quantity (like force) at every position
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spring scale
tool used to measure force
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free body diagram
a diagram showing all the forces acting on an object
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flat line on a distance vs time graph shows
motion has stopped
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Steep line
(on distance time graph)
(on distance time graph)
Object is moving quickly
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gradual slope (shallow or gentle slope) on distance vs time graph
object is moving slowly
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two things that acceleration depends on
force and mass
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If two forces act in opposite directions, how do you determine net force?
subtract the forces
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If two forces work in the same direction, how do you determine net force?
add the forces
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Net force is greater than zero
object will accelerate in direction of larger force
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net force is zero
motion of object will not change
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Length of arrow; free body diagrams
shows the magnitude of the force
