1. Chapter 3.1
Scalars and Vectors

2. Review
• Scalar – magnitude and no
direction
– Example – speed of a car is 65
mph
• Vector – magnitude and direction
– Example – ball is thrown down
with a velocity of -5 m/s

3. Addition of Vectors
• Resultant – a vector representing the
sum of two or more vectors
• Can be found by drawing to scale on
paper
–Start with the tail at the head of the
first vector
–Resultant can be found by connecting
the two vectors

4. Vector Subtraction
• To subtract a vector, add its opposite
(vector with same magnitude but
opposite in direction)