Latest Greatest Honors Physics Practice Final

It is with bittersweet anticipation that I present you with this: your last practice test. We have learned quite a bit this year and I will miss not having you in physics next year (unless of course you fail this final miserably and retake physics!) On the actual final you will have 2 hours to do 50 Multiple Choice problems, which gives you about 2 ½ minutes per problem. Each problem is worth 4 pts for a total of 200 pts. Use your PJ! Make sketches for each problem and show your work! Failure to show work may result in loss of credit.

Triangles, Slopes,SICK Fruit and Other Math Stuff

1. An alien vessel has been detected in space. Station A in Washington State sees the ship at point A against the starry background as shown in the star map. At the same time5,900 miles away European astronomers at station B see the ship at point B. The angular position can be found by referring the numbers in minutes of arc superimposed on the map. Remember, 60 minutes of arc = 1 deg, and θ is half the shift you see in the sky. The distance d to the alien vessel is

A) 5.6 x 104 miD) 6.8 x 106 mi

B) 1.7 x 106 miE) 3.4 x 106 mi

C) 2.7 x 106 mi

2. What is 8.0/9?

A) 0.8

B) 0.9

C) 0.89

D) 0.889

E) 0.8889

3. In an experiment a student measures b1to be 75.4 cm. b2 is measured to be 71.54 cm. What is b1 - b2?

A) 3.9 cm

B) 4.0 cm

C) 3.9 cm

D) 3.86 cm

E) 3.86 cm exactly

4. You weigh 142lbs, standing on your bathroom scale. You pick up a huge 0.45 lb chinchilla. What will the bathroom scale read now?

A) 142.45lbs

B) 142.5lbs

C) 142lbs

D) 143lbs

E) 1.4 x 102lbs

5. Which of the following is most nearly equal to the slope of this right triangle?

A) 0.27

B) 0.30

C) 0.33

D) 0.36

E) 0.39

6. What is the slope of the incline of this right triangle with angle θ = 22o?

A) 0.93

B) 0.37

C) 0.40

D) 0.44

E) blue

7.An astronaut does a falling bootticker tape lab on Marsand finds that the acceleration is 0.412 cm/tic2. Convert this acceleration to m/s2 given that there are30 tics in a sec.

A) 7.42 m/s2

B) 3.71 m/s2

C) 1.86 m/s2

D) 1.61 m/s2

E) 0.95 m/s2

Light

8. Somehow two rays follow this bizarre path from a tiny bulb at point A to your eyes. Based on the information your eyes receive, your brain will know that the bulb is located at point ______.

A) A

B) B

C) C

D) D

9-10: An oily substance has an index of refraction of 1.4 .

9. What is the speed of light in this material?

A) 4.2 x 108 m/sD) 2.1 x 108 m/s

B) 0.71 m/sE) 1.7 x 108 m/s

C)3.0 x 108 m/s

10. This oily substance is poured onto water (n = 1.333) in a glass making a flat interface between the two substances. If θ1 = 57o in oil, what is θ2 in the water?

A) 88oD) 30o

B) 53oE) 0.88o

C) 62o

11. A light ray travels along the path shown, from medium 1 to medium 2. The speed of light will ______as the beam changes mediums.

A)decrease

B)increase

C)remain constant

12. Which of the following best describes the image?

A)Inverted, enlarged, real

B)Inverted, reduced, virtual

C)Erect, enlarged, virtual

D)Inverted, reduced, real

E)Trick question! There is no image!

13. Which of the following best describes the image formed by the concave mirror?

A) Inverted, enlarged, real

B) Erect, enlarged, real

C) Erect, enlarged, virtual

D) Inverted, reduced, real

E) Trick question! There is no image!

14. The accompanying picture is a top view of a room with a candle in it. The room has two full height floor to ceiling walls (shown in grey) inside of it. All of the walls in the room are flat black (meaning that they reflect no light) except for the 2 mirror walls. The only light in the room comes from the candle. Which of the following points is in darkness?

A)Only A

B)Only B

C)Only C

D)A and C

E)None: all the points receive light

Kinematics (Motion)

Which of the following variables are relative?

i. positionA) i onlyD) i and ii only

ii. velocityB) ii onlyE) ii and iii only

iii. accelerationC) iii only

A runner accelerates uniformly from 3.0 m/s forward to 15.0 m/s forward in 6.0 s. What is her acceleration?
0.50 m/s2D) 2.67 m/s2
1.0 m/s2E) None of the above
2.0 m/s2

17-18: A car drives forward 120 miles due south from the origin (x = 0). Then it returns home, straight back to the origin. The total trip took 4.0 hours.

What was the total displacement of the car?

A)0 miD) None of the above

B)120 mi

C)240 mi

What was the average velocity of the car?
0 mi/hrD) 60 mi/hr forward
30 mi/hr forwardE) None of the above
40 mi/hr forward

Reem and Sami are having a race. Take a look at their velocity versus time graphs. Who covers the greatest overall distance?

a) Reem

b) Sami

c) Neither, they travel the same distance

20-21: A rocket executes the motion shown in this

velocity vs time graph.

What is the rocket’s average acceleration for the

interval shown?

A) +120 m/s2

B) –120 m/s2

C) +90 m/s2

D) –90 m/s2

E) Can’t be determined from this graph.

What is the rocket’s displacement for the interval shown?

A) 6.0 x 105 mD) 3.0 x 104 m

B) 4.8 x 104 mE) Can’t be determined from this graph.

C) 6.0 x 104 m

22.Zach is off exploring an abandoned mine. He falls from rest for 0.80 seconds into a pit.How fast was he going on impact?

A) 48 m/sD) 3.1 m/s

B) 7.8 m/sE) None of the above

C) 3.9 m/s

23-24: The General Lee is traveling at 45 m/s when it launches off the end of a ramp inclined at an angle of 30o. It lands on a horizontal road at the same elevation it launched from.

23. What is the horizontal component of the car’s launch velocity?

A) 45 m/sD) 26 m/s

B) 39 m/sE) None of the above

C) 23 m/s

24. What is the horizontal flight distance?

A) 1.8 x 102 mD) 2.3 m

B) 1.0 x 102 mE) None of the above

C) 4.0 x 102 m

DYNAMICS (FORCES)

25. Lola and Megha are arguing over which is more fun: studying physics or having your tooth pulled. Anyway, things get out of hand and Lola gives Megha a shove, causing Megha to tumble over. Which of the following can we be sure of?

A) Lola pushed on Megha harder than Megha pushed back on Lola

B) Meghapushed on Lola harder than Lola pushed back on Megha

C) Lola pushed on Megha with exactly the same force magnitude that Megha pushed on Lola

26-27: You (55 kg) are lying against the wall of a gravitron of radius R = 12 m that is rotating with a constant rim speed of v = 15 m/s. Assume that you are at the high point.

26. What is the magnitude of your acceleration?

A) 1.9 m/s2D) 9.8 m/s2

B) 9.0 m/s2E) 19 m/s2

C) 9.6 m/s2

27. What is the magnitude of the normal force acting on you?

(Don’t do interim rounding!)

A) 0D) 9.8 N

B) 4.9 x 102 NE) 19 N

C) 9.0 N

28. A bowling ball rolls to the right on a horizontal surface with constant velocity. (Assume friction is negligible.) Which of the following diagrams best represents the forces that act on the ball in this circumstance?

29. Chirag is running to the right over level ground, and slowing down. Which of the following diagrams best represents the forces that act on Chirag in this circumstance?

30-31. You (m = 55.5 kg) are standing in an elevator on a bathroom scale. The elevator is acceleratingdownward with anacceleration of 4.90 m/s2. Let g = 9.80 m/s2.

30. What will the bathroom scale read?

A) 272 ND) 55.5 kg

B) 544 NE) None of the above

C) 816 N

31. You will feel ______your normal weight.

A) heavier than

B) lighter than

C) the same as

WORK, MOMENTUMAND ENERGY

32. You go to the gym and get hit in the chest by a 8.0 kg medicine ball traveling at 3.0 m/s relative to you. What is the ball’s kinetic energy relative to you?

A) 36 JD) 24 kg m/s toward you

B) 36 J toward youE) 0: you are one with the ball

C) 24 kg m/s

33-34.In the excitement of the approach of summer you park your car on a small hill and once again forget to set your parking brake. By the time your 2500 kg Cadillac reaches level ground it is traveling at 4.5 m/s. Assume friction and air resistance acting on the car are negligible!

33. What is the magnitude of the horizontal force must you deliver to the caddy to stop it on level ground in a time of 56 seconds?

A)1.7 x 102 N D)2.5 x 104 N

B)2.0 x 102 NE)5.0 x 104 N

C)1.1 x 104 N

34. What is the magnitude of the horizontal force must you deliver to the caddy to stop it on level ground in a distance of 450 m?

A) 1.7 x 102 N D) 2.5 x 104 N

B) 2.0 x 102 NE) 56 N

C) 1.1 x 104 N

35-36: You are pulling a 50.0 kg sled (initially at rest) along a frictionless frozen lake, with a constant force F =

74 N directed at an angle of 35o above the horizontal. You pull for a horizontal displacement of 4.0 m. (Assume there is no friction acting on the sled but there is friction between your crampon clad boots and the ice.)

35. Find the amount of work you have done on the sled.

A) 2.0 x 103 JD) 3.0 x 102 J

B) 1.6 x 103 JE) 2.4 x 102 J

C) 1.7 x 102 J

36. Find the change in KE of the sled.

A) 2.0 x 103 JD) 3.0 x 102 J

B) 1.6 x 103 JE) 2.4 x 102 J

C) 1.7 x 102 J

37. You (m = 55 kg) are on roller skates on level ground traveling at 12 m/s heading toward a ramp that will launch you straight up. How high up from the ground will you go? Friction and air resistance are negligible.

A) 7.3 mD) 0.14 m

B) 5.4 mE) Problem cannot be solved because acceleration is not constant.

C)0.61 m

38. You (m = 55 kg) slide down a giant water slide starting from rest, and get launched through the air as shown into a lake. What will your final speed be just before you hit the lake? Let h1 = 15 m and h2 = 9 m. Assume that there is no friction or air resistance.

A) 4.7 x 102 m/s

B) 2.9 x 102 m/s

C) 22 m/s

D) 17 m/s

E) 13 m/s

39-40: A 2.0 kg pistol fires a 1.0 g bullet (watch units!) with a muzzle speed of 1200 m/s. The bullet then strikes a 6.0 kg wooden block resting on a horizontal frictionless surface. The block and the embedded bullet then slide across the surface.

39. The explosive charge (gunpowder) in the pistol acts on the bullet for 0.0010 s. What is the average force exerted on the bullet while it is being fired?

A. 7.2 x 106 ND. 1000 N

B. 7200 NE. 1.2 x 103 N

C. 120 N

40. What is the speed of the “bullet + block” system immediately after the bullet is embedded in the block?

A. 0.2 m/sD. 25 m/s

B. 0.20 m/sE. None of the above

C. 0.17 m/s

ELECTRICITY

Problems 41-43. Consider the two circuits with identical resistors.

41. Which of the following statements about current is true?

A) The current through allthe resistors is the same.

B) The current through the battery in circuit 1 is smaller than the current through the battery in circuit 2.

C) The current through each resistor in circuit 1 is greater than the current through each resistor in circuit 2.

D) None of the above.

42. Which of the following statements about voltage is true?

A) The voltage across each resistor in circuit 1 is greater than the voltage across each resistor in circuit 2.

B) V3 + V4 = 9 V.

C) Thevoltage across the resistors in circuit 2 are equal to each other.

D) All of the above.

43.Suppose all of these resistors are light bulbs. Which of the following statements are true?

A) If R1 is unscrewed R2 will stay on.

B) If R3 is unscrewed R4 will stay on.

C) All of the above

44. If the voltage across R1is 9 V, what is the

resistance of R1?

A) 1 Ω

B) 2 Ω

C) 3 Ω

D) 4 Ω

E) 9Ω