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17 Cards in this Set

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