1. Physics 8-28 Find your Quiz and grab a self assessment
Do the Warm up on the board on a warm up slip:
Be ready to discuss: You drive 4.3 mi from the grocery store to your house. Then you drove 2.1mi to your friend’s house. What is the distance and displacement traveled?

2. Quiz Self Assessment Grade your quiz Complete the Self Assessment
Complete the tutorials by Wednesday
Return the signed self assessment stapled over the quiz before you retake the quiz in the testing center before Friday

3. Recap Review Distance is the total traveled
Displacement is the distance in a straight line between point origin to final

4. Velocity vs. Speed
Speed is how fast something travelled across a distance
Ex. 60 mph
Velocity is how fast something travelled in given direction
Ex. 25 m/s East
Are these units the same?
Which is a scalar, vector, how do you know?

5. Velocity Calculations
Velocity = distance/ time 𝑑𝑖𝑠𝑡 𝑡𝑖𝑚𝑒 = 𝑑 𝑡
Ex. It takes Jen 15 seconds to run down the 30 m hallway. What is her velocity?
Use GUESSS Method
Given
Unknown
Equation
Substitute
Solve
Sense? with Units

6. Vector Calculations Vectors can be added together or subtracted
This is usually done graphically
How do you know when to add and subtract?

7. More about Vectors A vector is represented on paper by an arrow
1. the length represents magnitude
2. the arrow faces the direction of motion
3. a vector can be “picked up” and moved on
the paper as long as the length and direction
its pointing does not change

8. Understanding Vector Directions
4km N W E S

9. Mathematical Addition of Vectors
Vectors in the same direction:
Add the 2 magnitudes, keep the direction the same.
Ex =
3m E m E m E

10. Mathematical Addition of Vectors
Vectors in opposite directions
Subtract the 2 magnitudes, direction is the
same as the greater vector.
Ex.
4m S m N = m S

11. Mathematical Subtraction of Vectors
Subtraction of vectors is actually the addition of a negative vector.
The negative of a vector has the same magnitude, but in the 180° opposite direction.

12. Practice
Complete Part 1 on the worksheet

13. Graphical Addition of Vectors (cont.)
3 Km
Scale: 1 Km = 1 cm
4 Km
Resultant Vector (red) = 5 cm, therefore its 5 km.
How was this found?
Is this 100% accurate?

14. Vector Addition a2+ b2= c2 c2 = a2+ b2 c2 = a2+ b2 c = 32+ 42
What is the actual length of the vector?
a= 3, b= 4, c=5 a= b= c=

15. Practice Complete Part 2 on the worksheet
What is the difference between what the problems in Part 2 ask you to do compared to what the problems in Part 3 ask you to do?
Complete Part 4 which is mixed practice

16. Closure What did we learn today? (We will) How did we do that?
What were we expected to complete today? (I will)
What do you need to do if you did not complete this?
Complete your summary
and at least 3 critical questions