Studied by 11 people
Kinematics
Deals with the concepts that are needs to describe motion. How things move in a straight line.
Dynamics
The effect that forces have on motion.
x_{0}
initial position
x
final position
\Delta
“change in”
final - initial
\Delta x=x-x_{0}
Equation for displacement
One-dimensional kinematics
Deals with motion along a straight line, considering only one direction.
Displacement
The change in position of an object. It is a vector quantity, having both magnitude and direction. Symbolized by Δx.
Velocity
The rate of change of displacement. It is a vector quantity, having both magnitude and direction. It is calculated as the displacement divided by the elapsed time.
\overrightarrow{v}=\dfrac{\Delta \overrightarrow{x}}{\Delta t}
Equation for average velocity
moving in the positive direction
If average velocity is positive, the object is…
moving in the negative direction
If average velocity is negative, the object is…
not moving
If average velocity is zero, the object is…
v= total distance/total time
Equation for average speed
Speed
The rate of change of distance traveled. It is a scalar quantity, having only magnitude. It is calculated by the total distance traveled divided by the time taken.
Acceleration
The rate of change of velocity. It is a vector quantity, having both magnitude and direction. It is calculated as the change in velocity divided by the time taken.
increasing with time
If average acceleration is positive, the speed is…
decreasing with time
If average acceleration is negative, the speed is…
at constant speed
If average acceleration is zero, the speed is…
Equations of Motion
The equations that relate displacement, velocity, acceleration, and time.
x
Variable for displacement
a
Variable for acceleration
v
Variable for velocity
v_{0}
Variable for initial velocity
t
Variable for time
Free fall
All bodies at the same location above the Earth fall vertically with the same acceleration.
Acceleration due to gravity
The motion of free fall and the acceleration of a freely falling body
-9.80 m/s²
Acceleration (a) is equal to
9.80 m/s²
Acceleration due to gravity (g) is equal to
Note 
Flashcard (93)