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27 Cards in this Set
- Front
- Back
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force
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push or pull
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properties of forces
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orientation- vector
direction-poitive or negative magntitude-amount of applied force line of action-line through tip and tail point of application-point where it recieves force |
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newtons first law
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an object in motion must stay inmation and an object at rest must stay in rest unless acted on by an outside force
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example of newtons first law
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coo\ffee cup stays as a car drives away
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SEcond Law
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force=mass x acceleration
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third law
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for every action, there is an equal and opposite reaction
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example of newtons second law
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car is broke down
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third law example
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tennis ball falling, coming back up
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4 types of forces-
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non contact-they dont touch
contacat-physical contact of two bodies external- change the motion, internal- change the shape action- the initially applied force, reaction- the equal counterforce |
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what is friction?
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force that resists the sliding of 2 objects in contact
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types of friction
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static- we don't slide b/c applied force is less than static
kinetic-the start of movement rolling- easiest to overcome, |
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coefficient of restriciton
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ability of an object to return to its original shape after deformation
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types of collisions
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ineslastic and elastic
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ineslastic collision
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stick together, car t boning another
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elastic collision
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bouncing off each other
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kinematics
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time and space without regard to causative forces
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displacement
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change of linear position of the system is a straight line
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velocity
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the vector rate of motion
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direction
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positive or negative signs
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acceleration
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change in magnitude and or direction of the velocity
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kinetics
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study of forces that inhibit , cause, facilitate or modify the motion of a body
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linear momentum with newtons first law
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According to Newton’s first law, there will be no change in the state of motion without an externally applied force
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how is momentum gained?
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increasing mass and velocity
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principle of work and energy
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the work performed by externally applied forces other than gravity causes a change in energy of the object acted upon.
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angular motion
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rotation
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torque
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moment of force
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angular kinematics vs linear kinematics
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torque is present.
specified axis of rotation. the number of revolutions may be specified |
