1. Yesterdays practice
Pg 126 Q 1-3

2. Yesterdays homework
1. Fx=60.6N Fy=35.0N N at 25.0 counterclockwise from straight down N at 35.7 west of north

3. inertia
Inertia: the tendency of an object to resist being moved or, if the object is moving, to resist a change in speed or direction.
Sometimes Newton’s first law is known as the Law of Inertia because it states that in the absence of net force, a body will preserve its state of motion.

4. When the cardboard is jerked quickly, the coin will fall into the glass.
Explanation:
The inertia of the coin resists the change of its initial state, which is stationary.
As a result, the coin does not move with the cardboard and falls into the glass because of gravity.

6. Inertia: the tendency of an object to resist being moved

7. Inertia and the Operation of a Seat Belt
Section 2 Newton’s First Law
Chapter 4
Inertia and the Operation of a Seat Belt
While inertia causes passengers in a car to continue moving forward as the car slows down, inertia also causes seat belts to lock into place.
The illustration shows how one type of shoulder harness operates.
When the car suddenly slows down, inertia causes the large mass under the seat to continue moving, which activates the lock on the safety belt.

8. Mass is a measure of inertia
Mass is a measure of the amount of matter in an object, it is also a measure of the inertia of an object.

9. Homework Define Equilibrium using text on page 127
Complete questions 1-5 on page 127

10. Free-body Diagram Quiz