Kinematics in 1D Test
What does the variable "V^f" represent?
Final Velocity
What do "keys for the city" help you figure out?
Go down the line; D vs T, V vs T, A vs T
deceleration
The rate at which velocity decreases -m/s^2 -Vector
acceleration
The rate at which velocity increases -m/s^2 -Vector
Hint for Test- From Mr. Chung
There will be no curved graphs on the test
What does the variable "T" represent?
Time
Fill in the Blank -The slope on a displacement vs. time graph (ie, Δ𝑑/Δ𝑡) gives ____________
Velocity
What is velocity at its highest point ?
Velocity at its highest point is 0 𝑚/𝑠 (object is momentarily at rest)
velocity vs. speed
Velocity- vector (measures speed AND direction) Speed- scalar -m/s
When the cart is pushed or released on an inclined ramp, velocity and speed ________
changes
Positive Velocities mean that the cart is ___________
moving away from the detector
Negative Velocities mean that the cart is ___________
moving towards from the detector
When the cart is pushed on a flat ramp, velocity and speed ___________
stay constant
kinematics
study of motion
What are two equal values when you are measuring objects' times going up and down?
time up = time down
Anytime the velocity graph crosses the x-axis, this mean the cart _________
turns around
slowing down
velocity and acceleration have opposite signs -negative acceleration
speeding up
velocity and acceleration have the same sign -positive acceleration
Problem Solving Strategies
-Step 1. Draw a quick diagram -Step 2. List known and unknown quantities -Step 3. Decide which of the kinematic EQs can help find the unknown -Step 4. Write equation with variables first, then plug in numbers after -Step 5. State final answer in context of problem. Include units!
vector
A quantity that has magnitude and direction
scalar
A quantity that has only magnitude
Fill in the Blank -The slope on a velocity vs. time graph (ie, Δ𝑣/Δ𝑡) gives ______________
Acceleration
What does the variable "A" represent?
Acceleration
What is the speed of acceleration?
Acceleration is always G = -10 m/s^2 for the entire time (both up and down)
What do the variables "Δ𝑑 = 𝑑𝑓 −𝑑0" represent?
Displacement
displacement vs. distance traveled
Displacement- vector (Distance from the origin point) Distance Traveled- scalar (Total distance moved)
Fill in the Blank - Finding the "signed area" (from the curve to the x-axis) on a velocity graph gives _______________
Displacements
What does the variable "V^0" represent?
Initial Velocity
What are two equal values when you are measuring objects' speeds going up and down?
Initial speed up = final speed down (except V^f = -V^0)
