1. Vector & Scalar Quantities

2. Characteristics of a Scalar Quantity
Only has magnitude (size)
Requires 2 things:
1. A value
2. Appropriate units
Ex. Mass: 5kg
Temp: 21° C Volume: 5 cm3
Speed: 65 mph Distance: 10 m
Time: 11:30 am Mass: 14 kg

3. Characteristics of a Vector Quantity
Has magnitude (size) & direction
Requires 3 things:
1. A value
2. Appropriate units
3. A direction!
Ex. Acceleration: 9.8 m/s2 down (Gravity)
Velocity: mph West
Force: 16 N up
Momentum: 45 kgm/s forward
Weight: 160 N down
Displacement: 20 miles east

4. Scalar or Vector? a. 5 m b. 30 m/sec, East c. 5 mi., North
 d. 20 degrees Celsius
 e. 256 bytes
 f mph, Northeast

5. 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