aim how can we distinguish between a vector and scalar quantity
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Aim: How can we distinguish between a vector and scalar quantity?

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Aim: How can we distinguish between a vector and scalar quantity?. Do Now: What is the distance from A to B? Describe how a helicopter would know how to travel from A to B Distance = 10 km (scalar) Displacement = 10 km East (vector). A. B. N. W. E. 1 unit = 2 km. S. Scalar.

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aim how can we distinguish between a vector and scalar quantity
Aim: How can we distinguish between a vector and scalar quantity?

Do Now:

What is the distance from A to B?

Describe how a helicopter would know how to travel from A to B

Distance = 10 km (scalar)

Displacement = 10 km East (vector)

A

B

N

W

E

1 unit = 2 km

S

scalar
Scalar
  • Quantities having only magnitude (a number)
    • Ex:
      • Distance – 10 m
      • Mass – 5 kg
      • Time – 30 s
      • Speed – 50 m/s
      • Energy – 500 J
vector
Vector
  • Quantities having both magnitude and direction
    • Ex:
      • Displacement – 10 m East
      • Velocity – 50 m/s West
      • Acceleration – 9.8 m/s2 down
      • Weight or Force – 50 N down
representing a vector
Representing a Vector
  • A vector is represented by an arrow pointing in a direction and drawn to a selected scale
    • Ex: 4 m/s South
    • Determine an appropriate scale

1 cm =

1 m/s

how can we determine angles
How can we determine angles?

N

East of North

West of North

North of East

North of West

W

E

South of East

South of West

West of South

East of South

S

draw the vector
Draw the Vector

40 N force 40° North of East

Scale:

1 cm = 10 N

1st directional word is

North

Protractor points north

N

40 N

40°

W

E

S

draw the vector1
Draw the Vector

N

120 m/s 65° West of South

Scale:

1 cm = 30 m/s

1st directional word is

West

Protractor points west

E

W

120 m/s

65°

S

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