kinematics

Give two ways the unit "meters per second over second" can be abbreviated.

(m/sec)*(1/sec) and m/s/s

Calculate the velocity of this object from 15 seconds to 40 seconds.

-4 m/s

Order the four point on the graph from fastest to slowest.

1. 2 2. 1 3. 4 4. 3

Rank the four points on the position vs. time graph in order from slowest to fastest.

1. 3 2. 4 3. 1 4. 2

1. speed 2. velocity 3. m/s 4. cm/s north

1. rate of change of distance traveled 2. rate of change of position 3. unit of speed 4. unit of velocity

Calculate the acceleration of this object.

4 m/s/s

What does a curve that gets flatter and flatter on a distance vs time graph mean?

A curve that gets flatter and flatter on a distance vs time graph means the object is slowing down.

What does a curve that gets steeper and steeper on a distance vs time graph tell you?

A curve that gets steeper and steeper on a distance vs time graph tells you the object is speeding up.

What does a flat, horizontal line on a distance vs time graph tell you?

A flat, horizontal line on a distance vs time graph tells you the object is at rest.

What does a negative slope (tilting downward) mean on a distance vs time graph?

A negative slope on a distance vs time graph means the object is slowing down.

Acceleration

A rate at which the velocity is changing.

What does a slope equal to zero mean on a velocity vs time graph?

A slope of zero on a velocity vs time graph means the object is moving at a constant velocity.

What does a straight line on a distance vs time graph mean?

A straight line on a distance vs time graph means the object moves with constant velocity.

The rate at which speed changes is called_.

Acceleration

The slope of a velocity vs. time graph is equal to the object's _.

Acceleration

What does the slope of the curve on a velocity-versus-time graph represent?

Acceleration

If I wanted my car to accelerate, I would... (Hit the gas pedal, Hit the brake pedal, Turn the steering wheel)

All of the above

An object accelerates if its speed changes. What is the other way an object can accelerate (without changing speed)?

An object can accelerate if its direction changes

A normal outdoor track is a 400 meter loop. If a runner travels exactly one time around the track, what is their distance traveled and what is their displacement?

Distance = 400 m Displacement = 0 m

What does it mean if the data line is below the x-axis on a velocity vs time graph?

If the data line is below the x-axis on a velocity vs time graph, the object is moving in a negative direction.

When you look at your car's speedometer, it tells you your...

Instantaneous Speed

If an object has an acceleration of 10 cm/sec^2, what do you know about how its speed changes over time?

Its speed changed by 10 centimeters per second each second

Velocity is the rate at which what happens?

NOT direction or distance or speed (probably position)

Velocity

Refers to speed in a given direction.

What does the slope of the curve on a distance-versus-time graph represent?

Speed

When you are riding the bus to school, what is your relative speed compared to the bus?

The relative speed is 0, you are going the same speed.

Scalar quantities include information about:

The size of the quantity

What does the slope of a distance vs time graph tell you?

The slope of a distance vs time graph tells you an object's velocity.

What does the slope of a velocity vs time graph tell you?

The slope of a velocity vs time graph tells you the object's acceleration.

The slope of a position vs. time graph is equal to the object's _.

Velocity

Which of these has a direction? (Distance, Velocity, Speed)

Velocity

If my cat is chasing a laser spot on the ground and moving "4.6 m/s down the hallway", am I describing the speed or velocity of my cat?

Velocity, because both how fast and the direction are being described.

The slope of a velocity vs time graph is equal to _________.

acceleration

Velocity is a combination of speed and _.

direction

Speed is the rate at which what happens?

distance changes

To find slope,

divide (y2-y1) by (x2-x1)

An object going really fast has a high acceleration.

false

Velocity is the change in an object's speed

false

speed

rate of change of distance traveled

velocity

rate of change of position

Instantaneous Speed

speed at a specific instant in time

Distance measures:

the length of the path traveled by an object

Displacement measures:

the straight line from the initial position of an object to the final position of the object.

If you are traveling to the North but slowing down, what direction is your acceleration vector?

to the south

Average Speed

total distance divided by total time

A quantity that includes magnitude and direction is called a:

vector

Speed with direction is called _.

velocity

The slope of a position vs time graph is equal to ______.

velocity

Acceleration is the rate at which what happens?

velocity changes