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