1. What is the difference between average speed and average velocity? List the possible units. How long does it take a car moving 60mph to travel 95 miles?
2. What is acceleration? How do you calculate it? What is the acceleration due to gravity?
3. What is inertia and what does it depend upon? Know newton’s first law of motion.
4. How do you calculate an object's weight on earth? How would weight be different on the moon? How is weight related to mass? How is weight related to the force of gravity?
5. What is meant by the term Net force? What is the net force on an object with a constant velocity? Draw a free-body diagram showing an object with constant velocity.
6. Be able to add two force vectors that are parallel to each other.
7. Be able to solve problems using Newton’s Second Law of motion.
8. Define the force of friction. List some examples of friction.
9. Describe the forces on an object in freefall. Be sure to discuss the force of friction for objects falling in a vacuum (empty space) and objects falling with air resistance. How do you find the net force in each case? How does air resistance affect “g” in each case?
10. What is Newton’s 3rd law of motion? Be able to identify action-reaction pairs.
11. Define the following and show how to calculate if applicable:
Momentum-
Impulse-
Inelastic collision-
Elastic collision-
Law of conservation of momentum-
12. If a 10 KG object moving 4 m/s runs into a 5kg object at rest and they stick together, how fast will they then be moving?
13. Define the following terms and writhe the units for each:
Frequency-
Period-
Wavelength-
14. What is the speed of a wave that has a wavelength of 2.0 m and a frequency of 0.5 Hz?
15. How do you recognize a transverse wave?
16. Sound is an example of what type of mechanical wave?
17. When does an observer experience the doppler effect?
18. What is the source of a sound wave and why does it need a material to travel through?
19. What does the speed of sound depend on and what materials does it travel through?
20. What is the wavelength of a 500 Hs sound in sir (Speed = 340 m/s)?
21. List the waves of the electromagnetic spectrum in order of decreasing wavelength (Increasing frequency and energy)