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17 Cards in this Set
- Front
- Back
mechanics
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study of motion of objects and related concepts of force and energy. divided into kinematics and dynamics
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kinematics
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how objects move
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dynamics
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deals with force and why objects move as they do
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translational motion
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move without rotating
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particle
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mathematical point and to have no spatial extent (no size)
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reference frame
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all measurements are made relative to a frame of reference
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coordinate axes
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represent reference frame (direction)
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position
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x axis for horizontal and y axis for vertical
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displacement
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change in position. how far a object is from the starting point
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vectors
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had magnitude and direction
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average speed
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total distance traveled along its path divided by the time it takes to travel this distance. speed is always positive
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velocity
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signify both magnitude of how fast its going and the direction it is moving. velocity is a vector
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average velocity
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displacement/ time elapsed=
(final position-initial position)/(time elapsed) |
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instantaneous velocity
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as time approaches zero. average velocity in short time interval
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average acceleration
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change in velocity/ time elapsed
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instantaneous acceleration
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change in velocity over time over very short time (m/s^2)
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deceleration
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slowing down. does not mean negative. as if object moving to left.
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