Vocabulary
Calculations
Graphs
Challenges
100
The rate at which your speed changes
Acceleration
100
A car traveling at 20 m/s for 30 seconds will travel how far?
D = S x t
600m
100
During which time period is the person stopped?
From 3-5 seconds
100
True or false: In order to accelerate on a bike, I must speed up?
False! You can chance directions in order to accelerate as well.
200
The object or background to which a person uses to determine if movement has occurred
Frame of Reference or Reference Point
200
A coach timed their track runner from a starting speed of 13 m/s but they slowed to 10 m/s over the course of 3 seconds. What is their acceleration?
-1 m/s2
200
Describe the motion of the runner by saying where they went, how quickly, and if steady pace or not.
This runner increased their speed, from slow to fast, and approached the start/where we measured from.
200
True or false: A satellite orbiting the earth is accelerating.
True! Moving in a circle means you are constantly changing directions and therefore velocity.
300
The rate at which your position changes
Speed
300
How much time would it take an airplane traveling at 200 m/s to cover 4000 meters?
t= d/s
20 seconds
300
Describe where, how quickly, and if the runner moved at a steady or changing pace during their run.
The blue line indicates a runner going further away, at constant and medium speed.
300
Which is true when moving quickly?
-You must be accelerating
-Your position is changing rapidly
-You must choose a new reference point
-Your line on a position v time graph must go up
-Your position is changing rapidly
400
Definition for Velocity ________________________
Speed in a given direction
400
What is the velocity of a runner going to McDonalds if they cover 800 meters in 20 seconds?
V= d/t
40 m/s to McDonalds (need direction or incorrect)
400
At the end of this graph, where is the object?
Back at the beginning, origin, or start
400
What matters most in determining an object's kinetic energy?
-Mass
-Speed
-Volume
-Density
Speed!
KE= 1/2 m v2
500
Motion refers to a change in _____________
Position
500
The velocity of a family in a car on the highway is 60 mph east; they traveled for 3 hours. What is their speed?
60 mph (same as velocity but no direction needed)
500
True or false: This person is accelerating.
True, their velocity increased!
500
When moving forward in a car, if the driver brakes, the people in the car lean forward. Why? (Use scientific vocab)
Inertia. We will learn more about this next unit.