Motion. Frame of reference ______________________________________, a frame of reference is needed.
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Transcript of Motion. Frame of reference ______________________________________, a frame of reference is needed.
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Chapter 11Motion
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Frame of reference______________________________________, a
frame of reference is needed.
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11.1 Distance and Displacement
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Relative Motion –_______________________________
________________________________________________
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DistanceThe length of a path between two points.Measured with the ________.
Displacement_________________________________________________________________________________________________________________________– a quantity that as
magnitude and direction. The magnitude can be size, length, or amount.
Add displacements using vectors.
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Displacement along a straight line.
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Displacement that isn’t along a straight path
Displacement that isn’t along a straight path
Resultant vector – _________
______________________________________________________
Red line
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11.2 Speed and Velocity
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Speed______________________________________________________________________________________________Measured in ____________
Ex: Speed of your car
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________________– computed for the entire duration of the trip.
Instantaneous speed – __________________________
________________________________________________Your car’s speedometer.
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Graphing Motion
________________________to describe motion.Slope of a line on a distance-time graph is speed.
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Car not at constant motion.Slope of straight portions = periods of constant speed.
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VelocityA description of both
___________________________________________________________________________Velocity is a vector.
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Combining VelocitiesTwo or more velocities add by vector
______________.
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11.3 Acceleration
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Acceleration______________________________________________Changes in speed, changes in direction, or
changes in both.
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Changes in SpeedAcceleration –
_________________________________________________________– car traveling at
constant speedNo longer pushed into seat.
_______________________– acceleration that slows an object’s speed.Car coming to stoplight – pulled away from
seat.
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__________________________The movement of an object toward Earth solely
because of gravity.Objects falling near the Earth’s surface
accelerate downward at a rate of _______________________
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Changes in DirectionYou can accelerate even if your
___________________Riding a bicycle around a curve.Your change in direction means you are
accelerating.
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Changes in Speed and DirectionExample – roller coaster ride
Car on windy road.
Roller coaster physics clip.
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Constant Acceleration______________________________________________Airplane’s acceleration at takeoff.
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Calculating Acceleration
You can calculate acceleration for straight-line motion by dividing the change in velocity by the total time.
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Graphing AccelerationSpeed-time graphs -
_____________________________________________________________________________
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Distance-time graph – ___________________________
________________________________________________Curve connects the data points that are
plotted.
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Instantaneous Acceleration______________________________________________
_________________________________________________
Skateboarder on a half-pipe. At every moment she has an instantaneous acceleration, even if she is standing still and the acceleration vector is zero.