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)