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30 Cards in this Set
- Front
- Back
Motion
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Change in position
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Displacement
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distance and direction of an objects final position from it's initial position.
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Vector
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quantity that is specified by both it's size and direction.
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Speed
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distance an object travels per unit of time
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Instantaneous Speed
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speed at a single instant of time
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Average Speed
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total distance traveled/total travel time
v^- =d/t |
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velocity
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speed on an object and direction of motion
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acceleration
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change in velocity divided by the time it took to occur
a= vf-vi/tf-ti |
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force
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push or pull that an object exerts on another.
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Net Force
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when two or more forces act on an object at the same time.
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Balanced Forces
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forces on an object that are equal in size and opp in direction.
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Friction
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force that opposes the sliding the sliding motion of two surfaces that are in contact.
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static friction
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force that prevents two surfaces from sliding past each other.
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Sliding friction
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force that acts on the opposite direction to the motion of a surface sliding on another surface.
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Air Resistance
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opposes the movement of an object that moves through the air.
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Terminal velocity
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highest velocity the falling obj will reach.
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Isaac Newton
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Published a set of three called the Newton's Laws of Motion.
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1ST Law of Motion
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states that if the net force of an obj is 0, the object stays at rest, if the obj is moving, it continues moving at a constant speed.
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inertia
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tendency of an onbject to resist a change in it's motion.
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2nd law of motion
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states that the acceleration of an obj is in the same direction as the net force on the obj.
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you can calculate net force with the second law by:
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a=fnet/mass
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gravity
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attractive forces between two objs that depends on the mass and distance between them.
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gravitational force equation:
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f=mg
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Weight + equation
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gravitational force exerted on an obj.
W=mg |
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centripetal acceleration:
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acceleration towards the center or a curved or circular path.
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centripetal force
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net force exerted towards the center of a curved path
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3rd law of motion
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for every action force there is an equal and opposite reaction.
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momentum + equation
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product of its mass and velocity
p=mv |
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law of conservation of momentum
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if objs exert forces only on each other, their total momentum is conserved.
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collision
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momentum is transferred from one obj to another.
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