Physics Chapter 3 Reading
1. Which of the following are vectors?
a. Number of sticks in a pile of wood:
b. The time it takes for a car to come to a complete stop:
c. The total displacement that a person walks from the origin:
d. The length of a baseball bat:
e. The velocity of a school bus:
2. Describe two things that a vector must have in order to be classified as a vector:
3. Describe two ways in which vectors can be added together:
4. A car travels 12 km due east and then travels 9 m due west. What is the resultant displacement
for both motions?
5. Draw scaled vectors for the following motions: 6 km 200 N of E and 10 km due S.
6. In your scaled drawling above, draw the resultant vector and measure its value and determine
its angle. Remember to use the scale when determining its value.
**Watch Video 1**
7. Describe each of Netwon’s three laws of motion.
**Watch Video 2**
8. Describe the process of creating a free body diagram. What is the purpose of a free body
diagram?
9. An apple is resting on a table. Draw a free body diagram to represent all the forces acting on
the apple.
10. A box is being pulled along a horizontal surface with an applied force. Draw a free body diagram
to represent all the forces acting on the apple.
11. A baseball is falling downwards from an initial height (ignore any air resistance). Draw a free
body diagram to represent all the forces acting on the baseball.
12. Repeat question 11, but now assume that the ball is moving upward after it was thrown.
13. A bird is flying horizontally with a fish in its beak. It then drops the fish accidentally. As the fish
falls, can it be classified as a projectile? If so, is it a horizontal projectile or is it an angular
projectile?
14. A ball is hit towards the outfield fence from a baseball bat after the ball was pitched. As the
baseball is in the air, can it be classified as a projectile? If so, is it a horizontal projectile or is it
an angular projectile?
15. For each case in questions 13 and 14, draw a free body diagram for each object while they are
travelling in the air. (Ignore air resistance)