Pre-AP Physics Study Guide for the 3^rd Six Weeks Test

1. Human reaction time is, on average 0.2 s. How far will an object fall OEASL in 0.2 s?

2. Note the figure below. Describe what is happening at point ‘A”.

3. From what kind of graph can displacement be found by calculating the area under the line?

4. From what kind of graph can displacement be found by reading the ‘y’ axis?

5. From what kind of graph can velocity be found by calculating the slope of the line?

6. Note the figure below. What action is graphed here?

7. Note the figure below. What happened when the object graphed crossed the ‘x’ axis?

8. Consider the graph below. What can be calculated from the tangent line?

9. A massive steel ball bearing is thrown straight up into the air. What is its velocity and acceleration at that point in its trajectory?

10. Note the two vectors below. Re-draw them so that a resultant can be found.

11. Note the cannon pictured below. If the muzzle velocity is 30 m/s what is the horizontal displacement after one second?

12. Note the illustration below. Study the diagram carefully and note the angle indicated by the three question marks. What is the magnitude of that angle?

13. Draw a graph showing the relationship between force and acceleration. The force is the independent variable and the acceleration is the dependent variable.

14. A ball is dropped and it accelerates towards Earth. Identify the action-reaction pair in the event.

15. Draw a FBD of an object in free fall.

16. What must an object be doing if there is a net non-zero force acting on it?

17. Note the figure. Which vector represents the component of gravity down the incline? Is it vector A, D or the perpendicular or parallel component of gravity?

18. What causes a moving object to change direction?

19. What causes an object standing still to move?

20. What causes a moving object to stop?

21. According to Newton’s first law, how much force, if any, is needed to keep an object moving at constant velocity?

22. What is the name given to that property of matter that describes its ‘preference’ to remain at rest?

23. What is the name given to that property of matter that describes its ‘preference’ to remain in motion at constant velocity?

24. A 20,000 N car goes forward along a level road at constant velocity, why is a force necessary to maintain the state of motion?

25. Draw a FBD of an object at terminal velocity.

26. Write the equation for power in terms of work and time.

27. Write the equation for power in terms of mass, acceleration, distance and time.

28. Write the equation for power in terms of Force and velocity.

29. What is the kinetic energy of a 65 kg student running at 3 m/s?

30. What is the kinetic energy of a 1 kg mass travelling at 1 m/s?

31. Show by means of dimensional analysis that a kilowatt hour is a Joule.

32. How many joules is a kilowatt hour?

33. Write the equation for the work-kinetic energy theorem.

34. As an object falls what happens to its kinetic energy?

35. What is the complete equation for work?

36. Why cannot work be done if the force is perpendicular to the direction of motion?

37. Write the equation for impulse in terms of momentum.

38. Write the impulse equation in terms of mass, acceleration, time and change in velocity.

39. Why does an egg survive being thrown at a blanket but it beaks when it hits a brick wall at the same speed?

40. Complete this statement: The momentum of a system before an event must equal the momentum of the system _____ the event.

41. How did Newton know that an unbalanced force must be acting on the moon?

42. If the force of gravity between two objects is 50 N, what will that force be if the distance between the two objects in increased by five times?

43. If the force of gravity between two objects is 50 N, what will that force be if the distance between the two objects in decreased by five times?

44. What, if anything, can insulate against gravity?

45. What property does all matter have such that matter is affected by gravitational fields?

46. Explain how an object can be weightless even though it is in a gravitational field?

47. Is the weightlessness of free fall any distinguishable from the weightlessness of, say deep space far from any star?

48. Write the equation for universal gravitation.

49. How is it that gravity can keep the moon up?

50. How can you tell that two systems are in thermal equilibrium?

51. A substance changes temperature from 20 ⁰C to 40 ⁰C. What is this change in temperature in Kelvins?

52. A substance changes temperature from 20 ⁰C to 40 ⁰C. What is this change in temperature in Fahrenheit?

53. Convert 88 ⁰F to Celsius and Kelvin.

54. What temperature has the same numerical value on both the Celsius and Fahrenheit scales?

55. Why will a lightweight down comforter keep you warmer on a cold winter’s night than several layers of heavy dense blankets?

56. Why is it a bad idea to put a heavy blanket on top of a lightweight down comforter?

57. By what means of energy transfer does the energy of the sun traverse the 93 million miles between it and Earth?

58. During which change of state, freezing or vaporizing, requires the addition of energy as heat?

59. During which change of state, melting or condensing, requires the subtraction of energy as heat?

60. Why is evaporation a cooling process?

61. Is boiling a cooling process as well?

62. What is the normal force exerted by a 25⁰ incline on a 500 N box?

63. The coefficient of friction between a 25 N book and a table top is 0.34. What force must be applied to this book in order to move it at constant velocity?

64. A 60 kg student is gravitationally attracted to his 2000 kg red Honda Accord with a force of 2.0 x 10^-6 N. How far is this student’s center of mass from the Honda’s center of mass? Express your answer to two decimal places.
65. How much energy is required to bring 300 g of ice from -5 C to 22 C? Express your answer to two decimal places and let the third decimal place represent the exponent. For example if the answer is 5.248 x 10⁷ you would grid 5.257.