vector/scalar, displacement, distance, avg. speed, velocity & PT Graphs Flashcards
distance
so fundamental, it’s diff 2 define w/out reference to distance, length, etc. the total length of the path traveled by an object
time
also extremely fundamental. elapsed time is the duration b/w 2 events.
instantaneous speed
speed at a given point in time. the distance traveled by the time it took 2 travel that distance. s = d/t.
average speed
total distance traveled divided by total time it took to travel that distance; the constant speed needed 2 cover the distance of the trip in the time of the trip
motion diagram
a series of images of a moving object that records its position after equal time intervals
particle model
replaces an obj by a single point. size of the obj must be much less than the distance it moves & ignore internal motions like waving of the arms.
origin
the point at which the variables have the value zero
position vector
locates the position of the object. length of position vector = proportional 2 the dist from the origin 2 the location of the moving obj @ a particular time.
scalar quantity
a quantity that tells you only the magnitude of something. mass, time, temperature, distance, speed
vector quantity
tells not only the magnitude of something, but also its direction. velocity, acceleration, position, force.
displacement vector
drawn from the position of the moving object @ an earlier time 2 its position @ a later time.
time interval
>T = T1 - T0
average velocity
V = >d/>t. increases whn d incrses & t dcrses. on a PT graph, same as slope.
instantaneous velocity
the speed and direction of an obj @ a particular instant in time
displacement
>x = d1 - d0. a change in position. d is always greater than or equal to the |>x|
direction of motion & no motion (“at rest”) on VT graph
wat regions indicate “slow” and what regions indicate “fast” on a VT graph
constant acceleration in pos. & neg. directions in VT graphs
constant deceleration in pos & neg directions on VT graph
