1. 2 pt 3 pt 4 pt 5pt 1 pt 2 pt 3 pt 4 pt 5 pt 1 pt 2pt 3 pt 4pt 5 pt 1pt 2pt 3 pt 4 pt 5 pt 1 pt 2 pt 3 pt 4pt 5 pt 1pt Matter in Motion Forces Work & Machines Energy Magnetism & Electricity

2. From the list below, _______ is a measure of velocity. A). 16 m/s/s B). -20 m/s/s west C). -50 k/h east D). -80 sec/min

3. C). -50 k/h east

4. On a speed-time graph, a flat line represents ___________ acceleration.

5. zero acceleration

6. What is the average speed of an object that travels 100 m in 10 seconds?

7. What is…10 m/s?

8. If there is no air resistance and you drop a 25 kg cannon ball and a 5 kg bowling, which ball will fall the fastest?

9. What is…neither; they will fall at the same rate.

10. After 30 minutes, Kyle returns to his home. How would the graph below look then?

11. What is…the slope would slant downward.

12. Friction acting on a rolling ball to eventually bring it to a stop is an example of … A). gravity B). inertiabalanced force C). air resistancen unbalanced D). an unbalanced forcection /reaction

13. What is… D). an unbalanced force

14. Of the following, _____ is a situation with balanced forces. A) a bicycle accelerating downhill. B) a car coming to a sudden stop. C) a child bouncing on a trampoline. D) a cat sitting on a windowsill.

15. What is…D) a cat on a windowsill

16. What is the net force on an object when you combine a force of 10 N north with a force of 5 N south?

17. What is… 5N north? =+

18. What two factors determine the strength of the gravitational force between two objects?

19. What is… the mass of the objects and the distance between them.

20. On Earth, an astronaut has a mass of 140 kg. When the astronaut goes into space, he will have… A)a mass of 140 kg, but less weight. B)less mass and less weight. C) a mass of 140 kg and a weight of 140 kg. D) less mass and a weight of 140 kg.

21. What is…A). a mass of 140 kg, but less weight.

22. In which situation is a person doing work on an object? A) An athlete lifts a barbell that weighs 10N. B)A student walks while wearing a backpack that weighs 15 N. C)A man pulls with 350 N force on a rope attached to a house. D)A worker holds a box 1 m off the floor.

23. What is… A)A weightlifter lifts a barbell that weighs 10 N.

24. How does a single fixed pulley make work easier? A). It reduces the size of the effort force. B). It increases the mass of the load. C). It changes the direction of the force. D). It multiples the effort force and changes the direction of the force.

25. What is… C). It changes the direction of the force.

26. Both the wedge and the lever are used in the operation of a ___________. A) garden shovel B) door C) block & tackle D) steering wheel

27. What is … A) garden shovel

28. In which class of lever is the output force ALWAYS greater than the input (effort) force?

29. What is… a second-class lever

30. A winding road is a series of inclined planes. How does a winding road make it easier for vehicles to travel up a hill?

31. What is… apply a smaller force over a longer distance.

32. Which is an example of a potential energy? A). A falling apple. B). A flowing river C). Your uneaten lunch D). A flying plane

33. What is … C). Your uneaten lunch

34. When energy changes from one form to another, some of the energy ALWAYS changes into _________ because of friction.

35. What is… thermal energy

36. At what point in the pendulum’s swing does it have the MOST kinetic energy and the LEAST potential energy? D

37. What is…Point C (most KE) D

38. What happens to a substance’s temperature during a change of state? The temperature _____________. A)rises. C)stays the same. B)falls. D)rises and falls wildly.

39. What is … C)stays the same.

40. Two ways that heat can be transferred by collisions of particles in matter are… A). radiation and convection B). convection and conduction C). conduction and radiation D). conduction and temperature

41. What is… B). convection and conduction

42. If you hold the opposite poles of two magnets together, the magnets will __________________.

43. What is … attract?

44. A thick, short wire has _______________ resistance than a long, thin wire.

45. What is… less resistance?

46. If bulb one goes out, bulbs 2 and 3 will ______________?

47. What is… go out.

48. What will happen to the current and resistance if a third bulb is added to the circuit below?

49. What is… current will increase and resistance will decrease.

50. Two ways to increase the magnetic field of a solenoid are…

51. What is… *Add loops of wire **Increase voltage ***Add an iron core