Chpater 2 PhysiKSaAA
chapter 2
displacement change in position to final position
velocity change of displacement divided by time
speed is change of distance/ speed
slope of velocity graph is x/t
lines going up in a straight line have constant positive velocity
straight line has zero velocity
line going straight down negatively velocity
instananeous velocity
velocity at an instant of time
like whats teh velocity at: t=3.0s?
this is usually compared with other graphs.
section 2.2
acceleration
rate of change in velocity
aavg=vf-vi/tf-ti
example 2b on pg 49
acceleration has direction negative positive like east west north or going fast or slow
table of velocity and acceleration
| vi | a | motion |
| + | + | speeding up |
get the picture?
– and – speed up
+ – slow
0 0 resting
motion with constant acceleration
as a ball falls from the ceiling its displacement changes as well as velocity. figure 2-11 pg.51
this is the world of chpater 2 physiksaaa
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