Study Guide for Unit 1: One Dimensional Motion

Acceleration

the rate of change of velocity in a given time interval

Displacement

Distance and direction of an object's change in position

Frame of reference

a coordinate system in which the position of the object is measured

Speed

distance at which an object travels per time interval

Average speed

total distance traveled divided by the total time

Instantaeous speed

speed at any given instant or point of time

Velocity

includes speed and direction of an object

Scalar

measurement with magnitude only

Vector

quantity that has magnitude and direction

The 2 common ways of expressing a changing speed are: \_________________________________.

average speed and instantaneous speed

For measuring large distance, you could use \_________________ while smaller distances could be measured by \______________________________________.

kilometers; centimeters or millimeters

When determining displacement from distances traveled, you would subtract the distances if \_________________________________________ and add the distances if \_____________________________________.

the directions are exactly opposite; motion is in the same direction

If an object is accelerating, it could be changing \________________________________________________.

speed, direction, or both

In a distance-time graph, you would plot the ________________ along the y-axis and ________ along the x-axis. This type of graph shows __________.

distance; time; speed

A constant velocity in a distance-time graph is represented by a \_________________ while a \__________ represents changing velocity. When an object is at rest, it is represented by a \___________________________________.

straight line; curve; horizontal straight line

In a velocity-time graph, you would plot the \_____________ along the y-axis and \________ along the x-axis. This type of graph shows \____________________.

velocity; time; acceleration

A constant acceleration in a velocity-time graph is represented by a \________________________ while a \___________ represents changing acceleration.

straight line; curve

When velocity and acceleration are both negative, then the object is \___________________________.

speeding up

When velocity and acceleration are of different signs (one negative and one positive) then the object is \___________________________.

slowing down

If an object is moving with a constant velocity, its acceleration is \_______.

zero

\______________________________________________________________ are all vectors.

Displacement, velocity, and acceleration

What is the symbol and unit for final velocity?

Symbol-Vf
Unit-m/s

What is the symbol and unit for initial velocity?

Symbol-Vi
Unit-m/s

What is the symbol and unit for displacement/distance?

Symbol-x or d
Unit-m

What is the symbol and unit for acceleration?

Symbol: a
Unit: m/s^2