Algebra-Based Physics 121: Exam 1 Study Guide
Algebra-Based Physics 121: Exam 1 Study Guide Phys 121
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This 5 page Study Guide was uploaded by Meyer Notetaker on Sunday September 25, 2016. The Study Guide belongs to Phys 121 at University of Wisconsin - River Falls taught by Dr. Matthew Vonk in Fall 2016. Since its upload, it has received 7 views. For similar materials see Algebra-Based Physics I in Physics at University of Wisconsin - River Falls.
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Date Created: 09/25/16
AlgebraBased Physics 121 Exam 1 Study Guide 9/24/16 Below are different types of questions you will be expected to answer on the following exam. Answers are highlighted in green. 1. If a foot is 12 inches and an inch is 2.54 cm, how many cubic centimeters are there in one cubic foot? a. 30 b. 200 c. 28,000 d. 3.5 x 105 e. none of the above 2. The force of gravity between mass M and mass m, whose centers are a distance of r 2 apart, is given by the following equation Force = GMm/r . G is the universal gravitational constant. If Force is measured in Newtons, what are the units of G? 2 2 2 2 2 2 2 2 2 2 a. kg /m b. Nkg /m c. m /Nkg d. kg /Nm e. Nm /kg The vector on the right has a length of 20 m in a direction d = 20 m that is 30 below the vertical. 30 3. What is the magnitude of the horizontal part of the vector? a. 10 m b. 17 m c. 19.8 m d. 3 m 4. What is the magnitude of the vertical part of the vector? a. 10 m b. 17 m c. 19.8 m d. 3 m For the vectors on the grid to the right: K J 5. What is the length of the vector N + M? L M (Round to one significant figure.) a. 2 units b. 3 units c. 4 units d. 5 units N 6. What angle does the vector N + M make with the xaxis? a. 63 b. 1.1 c. 45 d. 0.46 e. 27 7. What is the length of the vector J + K + L + M + N? Round to two sig figs. a. between 0 and 1 units d. between 4.2 and 6 units b. between 1.1 and 3 units e. more than 6 units c. between 3.1 and 4 units 8. If 3x + 2y = 13 and 4x + 5y = 8, what is the value of x? a. less than zero b. between 0.1 and 2 c. between 2.1 and 5 AlgebraBased Physics 121 Exam 1 Study Guide 9/24/16 d. between 5.1 and 8 e. greater than 8 9. A volcano ejects a chunk of rock straight up at a velocity of y = 30 m/s. Ignoring air resistance, what will be the velocity y of the rock when it falls back into the volcano’s crater? a. >30 m/s b. 30 m/s c. 0 m/s d. 30 m/s e. < 30 m/s The four graphs to the right represent position vs. time. Answer E if more than one trial fulfills the conditions. 10. Which trial(s) has zero (or close to zero) velocity just after the trial begins? (E) Trial A Trial B 11. Which trial has a constant velocity? (E) 12. What is the magnitude of the acceleration in Trial A? a. zero b. 3 c. 3/7 d. 9.8 e. there is not enough information Trial C Trial D You are driving down the highway late one night at 32 m/s when a deer steps onto the road 40 m in front of you. Your reaction time before stepping on the brakes is 0.70 s, and the maximum deceleration of your car is 8.3 m/s . 2 Disp. 40 m 40 m 40 m 13. How far do you travel in the 0.70 seconds it takes you to hit the brakes? V o 32 a. 20 m b. 24 m c. 22 m d. 6 m e. 40 m V f 14. What is2your average speed during that first 0.70 seconds before you hit the brakes? A 0 ma. 32 m/s b. 16 m/s c. 3 m/s d. 25 m/s e. 8.3 m/s T 15. What is your acceleration during that first 0.70 seconds before you hit the brakes? Disp. 2 2 2 2 a. Veoo 32 m/s 8.3 m/s c. 8.3 m/s d. 9.8 m/s e. 9.8 m/s 16. For theVperiod after the brakes have been applied, which of the following tables has the f 2 correct 8.3 m/s starting information? T a. b. c. d.Disp. Disp. V o 32 m/s V o 32 m/s V f 0 m/s V f A 8.3 m/s2 A 8.3 m/s2 T AlgebraBased Physics 121 Exam 1 Study Guide 9/24/16 17. How far do you travel while hitting the brakes? a. 22 m b. 4200 m c. 53 m d. 62 m e. 112 m 18. What is your average speed during the time when you’re slowing down? a. zero b. 32 m/s c. 16 m/s d. 8 m/s e. 57 m/s 19. What is the total time it takes you to stop? a. 0.7 s b. 1.4 s c. 2.3 s d. 3.9 s e. 4.6 s 20. How much distance is between you and the deer when you come to a stop? a. 18 m b. 22 m c. 9 m d. less than 1 m e. the deer would be smashed on the hood! Rank the balls based on how high they will go: a. v = 15 m/s b. v = 15 c. v = 10 m/s v = 10 m/s e. v = m/s 15 m/s = 45 = 90 = 30 = 60 = 60 H H H H H 21. Which will go highest? (E) 22. Which will go next highest? (B) 23. Which will be in the middle? (C) 24. Which will be the second lowest? (D) 25. Which will go the lowest? (A) 26. If the fastest you could throw a baseball was 12 m/s, at which angle above the horizontal would you have to throw it so that it would go exactly as high as baseball A? a. 32 b. 28 c. 39 d. 45 e. 51 AlgebraBased Physics 121 Exam 1 Study Guide 9/24/16 A cannonball is fired from a 13m tall cliff with a velocity of 83 m/s and an angle of 17 above the horizontal. The mass of the cannonball is 45 kg. Ignore air resistance. 13 m AlgebraBased Physics 121 Exam 1 Study Guide 9/24/16 27. What is the value of the horizontal part of the cannonballs velocity right after it is fired? a. 83 m/s b. 0 m/s c. 24 m/s d. 79 m/s e. 52 m/s 28. What is the value of the vertical part of the cannonballs velocity right after it is fired? a. 83 m/s b. 0 m/s c. 24 m/s d. 79 m/s e. 52 m/s 29. What is the value of the vertical part of the cannonballs velocity just before it hits the ground? a. 0 m/s b. 29 m/s c. 24 m/s d. 83 m/s e. none of the above 30. How far does the cannon ball go in the x direction before hitting the ground? a. 13 m b. 43 m c. 430 m d. 130 m e. none of the above 31. How long is the cannonball in the air? a. 1.2 s b. 2.5 s c. 5.5 s d. 5.0 s e. 3.3 s 32. What is the highest that the cannonball gets above the ground at the bottom of the cliff? a. 13 m b. 30 m c. 43 m d. 24 m e. 57 m 33. When the cannonball is the highest above the ground how fast is it moving? a. 83 m/s b. 24 m/s c. 79 m/s d. 103 m/s e. 29 m/s 34. How fast is the cannonball moving right before it hits the ground? a. zero b. 83 m/s c. 79 m/s d. 85 m/s e. 109 m/s 35. What is the value of the horizontal part of the acceleration of the ball right before it hits the ground? 2 2 2 2 a. zero b. 9.8 m/s c. 9.8 m/s d. 9.8sin17 m/s e. 9.8cos17 m/s 36. What is the value of the vertical part of the acceleration of the ball right before it hits the ground? 2 2 2 2 a. zero b. 9.8 m/s c. 9.8 m/s d. 9.8sin17 m/s e. 9.8cos17 m/s 37. Just before it hits the ground, what angle does the velocity of the cannonball make with the horizontal? a. 10 b. 15 c. 20 d. 25 e. none of the above
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