chapter 2 Flashcards
linear motion: all points on the body move
the same distance, direction, time
rectilinear translation
straight line
curvilinear translation
curved line
descriptors of linear motion
how far, direction, how fast, speeding up or slowing down
postion
location in space
distance is vector or scalar
scalar
displacement is vector or scalar
vector
displacement
linear distance in a specified direction
straight line between initial and final
speed is scalar or vector
scalar
speed
length of path traveled
velocity scalar or vector
vector
speed vs velocity
speed is distance
velocity is displacementt
instantaneous speed or velocity
rate of motion at an instant in time
acceleration
rate of change in velocity
acceleration unit
m/s^2
speeding up to starting: acceleration is in the ___ direction of motion
same
slowing down or stopping: acceleration is in the ___ direction of motion
opposite
sign of velocity and sign of acceleration are the same when
body is speeding up
sign of velocity and sign of acceleration is the opposite when
body is slowing down
does acceleration change when dropping an object from different heights
no
uniform acceleration
acceleration is constant
uniform acceleration allows for
prediction of future position and velocity
two main applications of uniform acceleration
vertical, horizontal
projectile motion
an object in the air acted on only by forces of gravity and air resistance
