CH.1 Kinematics Flashcards
What is the unit and symbol for distance?
Unit: Meter (m), Symbol: d
What is the unit and symbol for Time?
Unit: seconds (s), Symbol: t
Reference Frame
Lets us define where an object is located, relative to other object
The X-axis represents
One Dimension
The X and Y axis represent
two dimensions
Displacement
Describes how far you are from where you started, regardless of how you got there
Delta (triangle)
represents change
What is the equation used to calculate Displacement?
deltax= Xf-Xo
The measure of distance must always be _, while the measure of displacement can be _ or _
Distance= always positive, Displacement= positive/negative
Scalar
a quantity that has only a magnitude (number)
Vector
a quantity that has both a magnitude and direction
Time, Distance, and Speed are examples of
Scalar
Displacement is an example of
a vector
speed
the distance traveled divided by the time it took to travel that distance
What is the equation to find speed?
speed= distance/time
what are the units associated with speed?
meters/seconds
what is the average speed formula?
Same as speed, just with bar over top of the āsā
Velocity
a vector (magnitude + direction), not the same as speed
What is the equation for velocity?
V= deltax/ deltat or Xf-Xi/Tf-Ti or displacement/time
delta (triangle) means
change
acceleration
the rate of change of velocity
Velocity is the rate of change of
displacement
What is the equation for acceleration?
A= deltav/ deltat
Acceleration is a _ (vector/scalar)
Vector
What are the units for acceleration?
m/s^2
Explain Kinematics Equation 1: Vx= Vxo + Axt
Vx= final velocity, Vxo= initial velocity, Ax= acceleration, T= time
What is free fall?
when the only force acting on an object is the force of gravity
What is acceleration due to gravity?
when an unsupported object falls towards Earth, always has the same acceleration
Acceleration due to gravity=
-9.8 m/s^2
Velocity changes but _ will always stay the same
acceleration
Explain the path of a ball thrown in the air
starts with an initial velocity of 0, slows down, stops momentarily at the top, speeds up, and returns with a velocity of 0
