1. 3.2 Review

2. Which letter shows the point where the coaster has the most kinetic energy? A. A B. B,D,F, C. C D. E

3. How does the angle of an inclined plane affect the force needed to move an object?

4. What determines the potential energy of an object?

5. What determines the kinetic energy of an object?

6. Which inclined plane will make pushing a box up the ramp easier? Explain.

7. You need to lift a heavy piece of furniture into the back of the truck using 5 N of force. Which of the two ramps would require the LEAST amount of work? Ramp 1 is a distance of 15 meters. Ramp 2 is a distance of 5 meters. Explain.

8. Compare the potential energy and kinetic energy of the objects shown below. What word best describes the potential and kinetic energy of each object? POTENTIAL ENERGY OF ROCKS: HIGH LOW KINETIC ENERGY OF ROCKS: HIGH LOW

9. POTENTIAL ENERGY OF ROCKS: HIGH LOW KINETIC ENERGY OF ROCKS: HIGH LOW

10. POTENTIAL ENERGY OF CAR: HIGH LOW KINETIC ENERGY OF CAR: HIGH LOW

11. POTENTIAL ENERGY OF CAR: HIGH LOW KINETIC ENERGY OF CAR: HIGH LOW

12. POTENTIAL ENERGY OF PLANE: HIGH LOW KINETIC ENERGY OF PLANE: HIGH LOW

13. POTENTIAL ENERGY OF PLANE: HIGH LOW KINETIC ENERGY OF PLANE: HIGH LOW

15. At which position would the kinetic energy of the roller coaster cart be the greatest? a. W b. X c. Y d. Z

16. At which position would the potential energy of the roller coaster cart be the greatest? a. W b. X c. Y d. Z

17. Which statement best describes the energy changes that occur while a child is swinging from position A to position B? A. Kinetic energy decreases and gravitational potential energy increases. A. Kinetic energy increases and gravitational potential energy decreases. A. Both gravitational potential energy and kinetic energy decrease. A. Both gravitational potential energy and kinetic energy increase.

18. Machines (pulleys and inclined planes) are helpful because they: A. Make potential energy decrease. B. Make the need to do work zero. C. Makes lifting things easier by changing the way work is done. D. Makes objects in motion easier to lift by increasing kinetic energy.

19. Which pulley system will require the MOST amount of force to lift an object? A B C D

20. Which pulley system will require the LEAST amount of force to lift an object? A B C D

21. Which of the following would decrease the force needed to move an object up a ramp? A. increase the ramp length B. increase the ramp height C. decrease the ramp length D. decrease the ramp height length height

22. Which of the following would reduce the amount of pushing force the most? A B C D

23. Which best explains the relationship between the kinetic and potential energy of the cannon ball as it gets shot in the air. A. the potential energy decreases and kinetic energy increases as the cannon ball gets higher. B. the potential energy increase as the kinetic energy decreases as the cannon ball gets higher. C. the potential and kinetic energy decreases as the cannon ball goes higher. D. the potential and kinetic energy increases as the cannon ball goes higher.

24. How many different elements are in the compound? Ti 4 Fl 3 (FeO 2 ) 7

25. How many different elements are in the compound? CN 4 + 2H 3 H + 3 C 2 N

26. The mass of the rock is 25 grams. Calculate the density of the rock.

27. Using an inclined plane REDUCES the amount of force needed to pull the block up the inclined plane, by increasing the... A. pull of gravity B. surface area C. distance D. mass

28. The table provides the densities of several substances. A student has a sample of an element that has a volume of 8 cm 3 and a mass of 4 g. Based on the density, which element on the table could it be? A.Germanium B.Iron C.Lead D.Mercury SUBSTANCEDENSITY g/cm 3 Germanium4 Iron2 Lead16 Mercury3

29. What amount of force must act on the rope of the pulley in order to lift the load? A. 20 N B. Less than 10 N C. More than 20 N D. 10 N 20 N

30. What change in the experimental setup would require MORE force to pull the block up the inclined plane? A. Increasing speed when pulling block B. Reducing the mass of the block C. Increasing height of the inclined plane D. Increasing the distance of the inclined plane

31. Which of the following types of elements have a SHINY, LUSTER? A. Metals B. Non Metals C. Metalloids

32. What is the difference in average speed between two trains, one that traveled 260 km in 5 hours, and the other traveled 170 km in the same time?