leson 3 pt. 1

Positive Acceleration with Negative Velocity
- This implies that an object is slowing down while moving in a negative direction (towards the south).
- Example: When an object has positive acceleration but is moving in a negative direction, it indicates the object is decelerating.

Calculating Average Acceleration
- Given:
  - Average speed: 6.5 kilometers per second
  - Time (T): 60 seconds
- Task: Convert speed to meters per second and calculate acceleration.
  - Conversion:
    - 6.5 km/s = 6500 m/s (1 km = 1000 m)
- Average acceleration (a) is calculated using standard equations of motion.
  - Important to maintain significant figures: use three significant figures for measured numbers, while definitions (like 1 km = 1000 m) do not count.

What is 'g'?
- 'g' refers to the acceleration due to gravity, approximately 9.8 meters per second squared.
- Objects fall under gravity’s acceleration, with speed increasing by 9.8 m/s every second.
- Example: After 1 second, an object would fall at 9.8 m/s; after 2 seconds, it would be at 19.6 m/s.
- For quizzes, may assume g = 10 m/s² to simplify calculations.

Finding the number of g's
- To find acceleration in multiples of 'g':
  - Formula: Number of g's = Acceleration / g
- Example Calculation:
  - If acceleration is 108 m/s², then:
    - Number of g's = 108 / 9.8 = approximately 11 g's.
    - Displays acceleration experienced in scenarios like amusement park rides or astronaut training.

Quiz Overview
- Expected quiz content includes concepts covered in class discussion.
- Study from notes and review discussion boards to prepare effectively.
- Quiz format:
  - 10 questions to be completed in 15 minutes.
- Notes allowed during quiz, but time may restrict extensive searching for answers.

Mandatory Exclusion Date
- Homework due date set for Tuesday.
- Ensure timely submission to avoid exclusion from class activities.
- Instructor will conduct grading over the weekend after submissions are collected.