Vocabulary (EL's Only)
the distance the object moves per unit of time
speed
a ________ tells you the amount of something that occurs or changes in one unit of time
rate
to describe an object's motion, you need to know its ____________.
direction
True or false: Acceleration only means speeding up
False
a letter or symbol that represents a number that can change
variable
can be found by dividing the sum of values by the number of values given
average or mean
Formula to calculate speed
Speed = Distance divided by time
The 4 main directions velocity can travel in
north, east, south, west
A decrease in speed is sometimes called:
deceleration
A student graphed distance versus time for an object that moves 14 m every 2 seconds (s). What is the speed of the object?
7 m per second
The steepness of a graph line; ratio of the vertical change (the rise) to the horizontal change (the run)
slope
insTANtaneous speed
An error in determining the velocity of an airplane either in speed or direction could lead to this:
collision
An object that is traveling at a constant speed can also accelerate when it:
What is the average speed of a train that covers 80 km in 1 hour, 200 km in 2 hours, and 420 km in 4 hours?
100 km per hour
The speed at which an object travels in a given direction
velocity
How does the snow help skiers move down hills?
Reducing friction or less friction
A change in velocity can involve a change in speed, direction, or ________
Both
If a basketball player is shooting a ball on an arched path, how does the speed change
speed will decrease as it goes up and increase when it goes down
accelerate and transfer energy
the rate at which velocity changes
acceleration
Ms. Tan speedwalked 587 meters from the copy machine to class in 5 minutes. What is Ms. Tan's speed?
117.4 meters per minute
What is the velocity of a car driving LEFT of north
west or westward
The Clippers
Ms. Tan's TRUE height (not a trick question)
6 feet