Change the following questions to an ADDITION problem. 1. 4m E 6m W km N 5.0 km E m/s S 7.0 m/s S 3.

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1 Change the following questions to an ADDITION problem. 1. 4m E 6m W km N 5.0 km E m/s S 7.0 m/s S 3. Solve the following. Show the vectors being added and the resultant vector (VR). Show all work!!! m N m N m E m W 6. Calin rides his bike North for 2.0 km then turns West and travels 4.5 km. What is Calin s resultant displacement? 7. The highest speed achieved by a standard non-racing sports car is 97 m/s. Assuming that the car accelerates at 4.00 m/s 2, how long would this car take to reach its maximum speed if it is initially at rest? What distance would the car travel during this time? 8. The Sears Tower in Chicago is 443 m tall. Suppose a book is dropped from the top of the building. What would be the book s velocity at a point 221 m above the ground? Neglect air resistance.

2 9. Which of the following situations represents a positive displacement? (Assume positive position is measured vertically upward along a y- axis.) a. A cat stands on a tree limb. b. A cat jumps from a higher tree limb to a lower one. c. A cat jumps from the ground onto a tree limb. d. A cat jumps from a tree limb to the ground. 10. Which of the following units is the SI unit of velocity? a. meter c. meter per second squared b. meter per second d. second per meter 11. Which of the following is an example of projectile motion? a. a jet lifting off a runway b. fireworks being launched c. an soccer ball being kicked d. an aluminum can dropped straight down into the recycling bin 12. Which of the following is not an example of projectile motion? a. a volleyball served over a net c. a hand glider b. a baseball hit by a bat d. a stone skipping across the water 13. Which of the following forces arises from direct physical contact between two objects? a. gravitational force c. contact force b. fundamental force d. field force 14. Which of the following is the tendency of an object to maintain its state of motion? a. acceleration c. force b. inertia d. velocity 15. A net force of 6.8 N accelerates a 31 kg scooter across a level parking lot. What is the magnitude of the scooter s acceleration? a m/s 2 c. 3.2 m/s 2 b m/s 2 d. 4.6 m/s The magnitude of the gravitational force acting on an object is a. frictional force. c. inertia b. weight. d. mass 17. The weakest of the four fundamental force in the universe is a. Gravitational Force c. Strong Force b. Electromagnetic d. Weak Force 18. If friction is the only force acting on an object during a given physical process, which of the following assumptions can be made in regard to the object s kinetic energy? a. The kinetic energy decreases. b. The kinetic energy increases. c. The kinetic energy remains constant. d. The kinetic energy decreases and then increases.

3 19. A child has a mass of 20.0 Kg and a kinetic energy of J. What is it s velocity? a. 20. m/s c m/s b. 5.0 m/s d. 10. m/s 20. Which of the following energy forms is associated with an object due to its position? a. potential energy c. total energy b. positional energy d. kinetic energy 21. Which of the following is the rate at which energy is transferred? a. potential energy c. mechanical energy b. kinetic energy d. power 22. What term describes a change in the speed of an object in circular motion? a. tangential speed c. centripetal acceleration b. tangential acceleration d. centripetal force 23. When a car makes a sharp left turn, what causes the passengers to move toward the right side of the car? a. centripetal acceleration c. centrifugal force b. centripetal force d. inertia 24. What is the final angular speed of an object that a initial speed of 10. rad/s, an angular speed of 2.0 rad/s 2, and is accelerated for 3.0 minutes? a. 16rad/s c. 120 rad/s b. 90. rad/s d. 370 rad/s 25. Which of the following terms describes a transfer of energy? a. Heat c. temperature b. internal energy d. kinetic energy 26. What does temperature is 10.0 F measure in Kelvin and Celcius? a K, 18.0 C c K, C b C, K d K, 50.0 C 27. Find the temperature change of.100 kg of water with a specific heat of 4186 L/kgC, when 10,000. J of energy is removed? Imagine you could observe the individual atoms that make up a piece of matter and that you observe the motion of the atoms becoming more orderly. What can you assume about the system? a. It is gaining thermal energy. b. Its entropy is increasing. c. Its entropy is decreasing. d. Positive work is being done on the system.

4 28. For a mass hanging from a spring, the maximum displacement the spring is stretched or compressed from its equilibrium position is the system s a. amplitude. c. frequency. b. period. d. acceleration. 29. For a system in simple harmonic motion, which of the following is the time required to complete a cycle of motion? a. amplitude c. frequency b. period d. revolution 30. Sound waves a. are a part of the electromagnetic spectrum. b. do not require a medium for transmission. c. are longitudinal waves. d. are transverse waves. 31. The Doppler effect occurs with a. only sound waves. b. only transverse waves. c. only water waves. d. all waves. 32. What happens when a rubber rod is rubbed with a piece of fur, giving it a negative charge? a. Protons are removed from the rod. c. Electrons are added to the fur. b. Electrons are added to the rod. d. The fur is left neutral. 33. Electric field strength depends on a. charge and distance. c. Coulomb constant and mass. b. charge and mass. d. elementary charge and radius. 34. How is current affected if the number of charge carriers decreases? a. The current increases. b. The current decreases. c. The current initially decreases and then is gradually restored. d. The current is not affected. 35. The current in an electron beam in a cathode-ray tube is A. How much charge hits the screen in 5.0 s? a C c C b C d C 36. The amount of charge that moves through the filament of a lightbulb in 2.00 s is 2.67 C. What is the current in the lightbulb? a amps c amps b amps d amps 37. What is the potential difference across a 5.0 Ω resistor that carries a current of 5.0 Amps? a V c. 10.0V b. 25V d. 1.0V 38. Which of the following wires would have the greatest resistance? a. an aluminum wire 10 cm in length and 3 cm in diameter b. an aluminum wire 5 cm in length and 3 cm in diameter c. an aluminum wire 10 cm in length and 5 cm in diameter d. an aluminum wire 5 cm in length and 5 cm in diameter

5 39. If a 75 W lightbulb operates at a voltage of 120 V, what is the current in the bulb? a amps c amps b. 1.6 amps d amps 40. Which of the following is the best description of a schematic diagram? a. uses pictures to represent the parts of a circuit b. determines the location of the parts of a circuit c. shows the parts of a circuit and how the parts connect to each other d. shows some of the parts that make up a circuit 41. Three resistors with values of 4.0 Ω, 6.0 Ω, and 8.0 Ω, respectively, are connected in series. What is their equivalent resistance? a. 18Ω c. 6.0Ω b. 8.0Ω d. 1.8Ω 42. All of the following statements about magnetic field lines around a permanent magnet are true except which one? a. Magnetic field lines appear to end at the north pole of a magnet. b. Magnetic field lines have no beginning or end. c. Magnetic field lines always form a closed loop. d. In a permanent magnet, the field lines actually continue within the magnet itself. 43. In a magnetized substance, the domains a. are randomly oriented. b. cancel each other. c. line up mainly in one direction d. can never be reoriented. 44. In soft magnetic materials such as iron, what happens when an external magnetic field is removed? a. The domain alignment persists. b. The orientation of domains fluctuates. c. The material becomes a hard magnetic material. d. The material returns to an unmagnetized state. 45. When an iron rod is inserted into a solenoid coil s center, the magnetic field produced by the current in the loops a. causes the iron to return to an unmagnetized state. b. forces the domain in the iron out of alignment. c. causes random orientation of the domains in the iron. d. causes alignment of the domains in the iron. 46. An electron that moves with a speed of m/s perpendicular to a uniform magnetic field of 0.40 T experiences a force of what magnitude? (qe = C) a N c N b N d. 0 N 47. A current-carrying wire 0.50 m long is positioned perpendicular to a uniform magnetic field. If the current is 10.0 A and there is a resultant force of 3.0 N on the wire due to the interaction of the current and field, what is the magnetic field strength? a. 0.60T c T b. 15T d T

Electricity Mock Exam

Name: Class: _ Date: _ ID: A Electricity Mock Exam Multiple Choice Identify the letter of the choice that best completes the statement or answers the question.. What happens when a rubber rod is rubbed