1. Notes on Chapter 3 Motion in Two Directions
Conceptual Physics
Notes on Chapter 3
Motion in
Two Directions

2. Vector and Scalar Quantities
Projectile Motion
Vector and Scalar Quantities
Scalar
Scalar is just a number stand on a scale, it just tells you your weight
Vector
Vector is a number with a direction.

3. Projectile Motion Vector Addition +
A arrow is used to represent the magnitude and direction of a vector
A velocity is sometimes a result of the addition or subtraction of vector quantities

4. Projectile Motion Components of Vectors
Any single vector can be resolved into two components
Component vectors form right angles to each other
a VERTICAL component of the velocity
a HORIZONTAL component of velocity

5. See diagrams drawn on board
Projectile Motion
Construct parallelogram to find the RESULTANT
See diagrams drawn on board

6. Projectile Motion
Any projectile has both vertical and horizontal components. This path a projectile follows is a parabola.

7. Projectile Motion Horizontal component of velocity stays constant
Vertical component of velocity has gravity acting on it --- so it changes in it’s path.

8. Projectile Motion
Ideal path and actual path of a projectile are different
We look a ideal path — NO air resistance
If ideal --- then time up equals time down & velocity up equals velocity down

9. Projectile Motion Ideal Angle? 75" & 15" 60" & 30" 45" 90" & 0"
Pg 36 — what angle gives me the best distance
Max horizontal and vertical components
75" & 15"
60" & 30"
45"
90" & 0"

10. Projectile Motion
Monkey & Hunter Demo