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Chapter 3: Vectors. Vector Notation. v = speed v (or v )= velocity. Graphical Addition of Vectors. A bird flies 100 m due east, then 200 m 45 o north of west. Draw and measure the net displacement. Tail-to-Tip Method. Correct method. Resultant. tip. tail. A student drives her car

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Presentation Transcript
vector notation
Vector Notation

v = speed

v (or v )= velocity

graphical addition of vectors
Graphical Addition of Vectors

A bird flies 100 m due east, then 200 m 45o north of west. Draw and measure the net displacement.

tail to tip method
Tail-to-Tip Method

Correct method

Resultant

tip

tail

slide5
A student drives her car
  • North of 30 km/hr for 1 hour
  • East at 60 km/hr for 2 hours
  • North at 50 km/hr for 1 hour

Determine the net displacement

vector resolution
Vector Resolution

A car travels 500 km at an angle 30o north of east. Calculate its x and y displacement.

North

500 m

30o

East

vector resolution trigonometry
Vector Resolution: Trigonometry

sin q = opposite = o

hypotenuse h

cos q = adjacent = a

hypotenuse h

tan q = opposite = o

adjacent a

h

o

q

a

slide8
A mailman travels 300 m at an angle of 25o N of E, then 100 m at an angle 50o N of E. Calculate the total (resultant) displacement.

North

B=100 m

50o

A=300 m

25o

East

slide9
A student walks 100 m at an angle 20o south of west. He then walks 40 m due north, then 65 m at an angle of 35o north of west. How far is he from the starting point?
slide10
A mail carrier drives 22.0 km north. She then drives 47.0 km in a direction 60.0o S of E. What is her displacement from the post office?

(Ans: 30.0 km, -38.5o)

slide11
A plan travels due east for 620 km, 65o S of E for 440 km, and then 53o S of W for 550 km. What is the displacement from the airport?

(Ans: 960 km, -51o)