1. Name: __________________________ Class: _____ Motion 11
Name: __________________________ Class: _____ Motion 11.1 Distance and Displacement
Chapter 11

2. What are we going to learn?
Methods of describing motion
How can vectors be combined?

3. A story of motion...
Once upon a time, 3 students (George, Harry, and William) were on their way to school. When asked the question, “How fast are your friends moving?” there were very different and conflicting answers from the students.
George says that Harry and William are moving very fast.
Harry says that George is moving but William is not.
William says that George is moving but Harry is not.
If everyone is telling the truth, how can this be?
It’s all a matter of ___________________________...
_________________________________________________________________________________________________________________________________

4. Frame of Reference Relative Motion Distance
_________________ to describe motion __________________ and ___________________
A system of _____________ that are ______
_____________ with respect to __________________
Relative Motion
_________________ in relation to a _______________________________________
Distance
___________ of the ________ between _____________________________

5. Distance Units Displacement
______________ for distance: ___________ (m)
For very __________ distances: _________________ (km)
For distances _______________ than meters: ___________________ (cm)
Displacement
______________ from the __________________ and the length of a _____________________ from the starting point to the __________________
Gives information both about ___________________ an ________________ from a given point and in what ________________ the object is from that point
Displacement is a ______________

7. Vectors Vector Addition
A quantity that has ________________ and _________________ (can be __________, _____________, or _____________)
Add displacements using ______________________
Vector Addition
When two vectors have the ____________________, you can ____________________________________
When two vectors are in ________________
_________________, ________________ one ___________________ from the other
Ex: A police officer going the speed limit of 45 mph clocks you going in the opposite direction at 92 mph. _____________________________________

8. Since the vehicles are going in _________________
_________________, subtract the police officer vector from your vehicle vector...the ________________ is your _______________________________
92 mph – 45 mph = 47 mph
(_________________________________________)
When ____________________ vectors have _______________________________, combine them by ___________________
______________________________________ is the ______________ vector

10. Review Questions
What two things must you know to describe the motion of an object? ________________________________
True or false?
A frame of reference is not necessary to describe motion accurately and completely. _______________
Five blocks south is an example of a displacement.
_____________________________________________
Circle the letter of the SI unit best suited for measuring the length of a room in your home.
a. kilometers b. meters
c. centimeters d. millimeters

11. Imagine that you are a passenger in a car
Imagine that you are a passenger in a car. Circle the letter of the best frame of reference you could use to determine how fast the car is moving relative to the ground.
a. the people sitting next to you in the backseat
b. the driver of the car
c. a van traveling in the lane next to your car
a sign post on the side of the road
What would your total displacement be if you walked from your front door, around the block, and then stopped when you reached your front door again?
a. one block b. two blocks
c. the entire distance of your trip d. zero

12. Compare and contrast distance and displacement.
_________________________________________________________________________________________________________________________________________________________________________________________________________________________
A vector is a quantity that has both ______________ and ______________.
The vector sum of two or more other vectors is called the _________________________.
Circle the letter of each answer that could describe the magnitude of a vector.
a. length b. direction c. amount d. size

13. Because the two displacements are in opposite directions, the magnitude of the total displacement is ________________________ .
Circle the letter that answers the question. What is the displacement of a cyclist who travels 1 mile north, then 1 mile east, and finally 1 mile south?
a. 3 miles east b. 1 mile north
c. 3 miles south d. 1 mile east