First Law of Motion-INERTIA
Active Physics
Name: ______________________________Grade:___ Class Period: ___ Date:____________
Essential Question: What are the properties of inertia and how is it related to mass? PSc.1.2.3
Instruction: Open your textbook to pages 8 and 9 and answer the following questions.
1. What did Galileo Galilei ( 1564-1642) notice about the ball rolling on the ramp?
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
2. Use your Imagination! Illustrate or draw the ball rolling on the ramp. Show what Galileo saw.
3. What is a “thought experiment”?
_________________________________________________________________________________
_________________________________________________________________________________
4. What did Galileo imagine about the ball made of extremely hard material?
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
5. What was his conclusion on the motion of the rolling ball?
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
6. What was his conclusion on an object at rest?
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
7. Who formed the Principle of Inertia?
_________________________________________________________________________________
_________________________________________________________________________________
8. What is Inertia?
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
9. Explain using your own words how Galileo formed the Principle of Inertia. Think!
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
10. Who is Isaac Newton?
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
11. Who used Galileo’s Principle of Inertia and why did he use it?
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
12. How did Isaac Newton put credit on those before him? Do you consider this a virtue worth
emulating? Explain_________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
13. Explain the importance of the “prior motion” in sports. Think!
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
14. How is this shown in equation?
_________________________________________________________________________________
_________________________________________________________________________________
15. What captures everyones’s attention in sports?
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
16. What is Newton’s First law of motion?
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
17. According to Newton, what is the relationship between an object’s mass and its inertia?
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
18. Applying the relationship between mass and inertia, which has greater inertia a delivery truck
or a compact car? Explain. Think!
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
19. Why is inertia expressed in “kilograms of mass”? Think!
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
20. Explain why the 100kg cart has greater inertia.
a. at rest : __________________________________________________________________
__________________________________________________________________________
b. in motion : _______________________________________________________________
__________________________________________________________________________