Chapter 4 Flashcards
(16 cards)
1
Q
Mechanics
A
The modern study of motion
2
Q
3 parts of mechanics
A
Kinematics
Dynamics
Statics
3
Q
Kinematics
A
The description of how things move
4
Q
Dynamics
A
The description of what causes things to move
5
Q
Statics
A
The description of how stationary things react to pushes and pulls
6
Q
System
A
Part of the universe under study separated from its surroundings by an actual or imaginary boundary
7
Q
Surroundings
A
Everything outside a system’s boundary
8
Q
Time interval
A
delta t
Change in time
9
Q
Scalar
A
No direction
10
Q
Vector
A
Has direction
Represented by arrows
11
Q
Distance
A
Represented by d
Scalar
12
Q
Displacement
A
Represented by d bar
Vector
13
Q
Speed
A
Scalar
V
V=d/ delta t
14
Q
Velocity
A
Vector
V bar
V bar=d bar/ delta t
15
Q
Average speed
A
V=v1-v2/( # of vs)
16
Q
Acceleration
A
A=vf-vi/tf-ti
