Chapter 2: Kinematics in One Dimension

Question 1

kinematics

Answer 1

deals w/ concepts that are needed to describe motion

study of HOW things move

Question 2

dynamics

Answer 2

WHY things move

deals with effect that forces have on motion

Question 3

mechanics

Answer 3

kinematics and dynamics together

Question 4

displacement

Answer 4

shortest distance between initial and final positions

Question 5

average speed

Answer 5

distance/ change in time

Question 6

average velocity

Answer 6

displacement/ delta time
a vector
points same way as displacement

Question 7

instantaneous velocity

Answer 7

how fast and direction at each moment in time

Question 8

instantaneous speed

Answer 8

magnitude of instantaneous velocity

whats on your speedometer

Question 9

average acceleration

Answer 9

change in velocity/time

Question 10

instantaneous acceleration

Answer 10

limit as t-> 0 of change in velocity/time

Question 11

kinematics constant accceleration

Answer 11

v= initial v+at
x=1/2 (inital v+ final v)t
x= inital v*t + 1/2 at^2
v^2=inital v^2 + 2ax

Question 12

free fall stipulations

Answer 12

air resistance neglected
nearly constant acceleration
acceleration is due to gravity

Question 13

g=

Answer 13

9. 80 m/s^2

32. 2 ft/s^2