Kinematics Flashcards
No acceleration
d= vt
Uniform acceleration (constant)
d = V avg t
No inital or final velocity (no way to know average velocity)
d= (Vi)(t) + 1/2 at2FROM REST: d=1/2 at2
No time
vf2 = vi2 + 2ad
Pico (p)
10-12
Nano (n)
10-9
Micro (µ)
10-6
Milli (m)
10-3
centi (c)
10-2
kilo (k)
103
mega (M)
106
giga (G)
109
Displacement
an objects change in position regardless of its path
Average velocity
displacement / change in timeNOTE: if velocity happens to be constant there is no distinction between velocity and average velocity
Velocity can best be defined as
how FAST an objects postion changes, speed and direction
The magnitude of the velocity vector is called the _______
SPEED, Note: that speed is a scalar so it has no direction and can never be negative. Velocity is a vector that specifies both speed and direction
Average acceleration
change in velocity / change in time* Acceleration is trickier than velocity, both involve how fast something changes, acceleration is how fast velocity changes and an objects velocity changes if the SPEED OR DIRECTION changes. Therefore, an object can be accelerating even if its speed is constant
Acceleration in the same direction as velocity means the objects speed is
increasing
Acceleration perpendicular to velocity means objects speed is ___________
constant
acceleration in the opposite direction from velocity means objects speed is __________
decreasing
acceleration at an angle between 0 degrees and 90 degrees to velocity means objects speed is __________ and direction of velocity is changing
increasing
acceleration at an angle between 90 degrees and 180 degrees to velocity means objects speed is __________ and direction of velocity is changing
decreasing
The slope of a position vs time graph gives the _______
velocity
The area under a velocity vs time graph gives the __________
displacement