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19 Cards in this Set
- Front
- Back
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An objects change in position relative to a reference point
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Motion
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the change in position of an object
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Displacement
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The distance traveled divided by the time interval during which the motion occured
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Speed
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the speed of an object in a particular direction
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Velocity
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The rate at which the velocity changes over time; on object accelerates if its speed, direction, or both change
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Acceleration
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An action exerted on a body in order to change the bodys state of rest or mouth; force has magnitude and direction
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Force
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A force that aposes motion between 2 surfaces that are in contact
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Friction
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The force that resists the inititan of sliding motion between 2 surfaces that are in contact and at rest
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Static Friction
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The force that opposes the movement of 2 surfaces that are in contact and are sliding over each other
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Kinetic Friction
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What is required for determining of motion occured
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Reference Point
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What 2 measurments are required to determine on objects speed
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Distance
Time |
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What is the difference between distance and displacement
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Speed is how fast you are going. Velocity is how fast your going and changing direction
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What is the difference between distance and displacement
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Distance can be a straight line but doesnt have to be. Displacement MUST be a straight line.
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What are the 2 ways that velocity can change
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Change in speed
Change in direction |
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Speed or velocity
a. 123 mi/hr west b. -35 m/s c. 438 km/hr d. 50 m/s down e. .03 cm/s |
a. Velocity
b. Velocity c. Speed d. Velocity e. Speed |
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What is instantaneous speed
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The speed at any given point in time
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What is an instrument that can be used to measure instantaneous speed
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Speedometer
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what is acceleration
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The rate at which velocity changes over time
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Is acceleration always speeding up?
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No you can still be accelerating without speeding up
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