Name: Date: AP Physics 2 Summer Assignment (2014) Instructions: 1. Read and study Chapter 16 Electric Charge and Electric Field. 2. Answer the questions below. Some questions may require you to use your previous physics knowledge. 3. Submit your answers online using this form: https://docs.google.com/a/oceanschools.org/forms/d/1y0vravzvbiyyng- DLMP0pjUqlm4TUpQtK11794J5wbU/viewform?usp=send_form Your answers must be submitted online before the first day of class. Questions: 1. How many types of electric charge exist? A) one B) two C) three D) four 2. Two positively charged objects will A) attract B) repel C) neither 3. When two objects are rubbed together, such as a cloth and a glass rod, the resulting electric charge on the two objects will be A) the same amount and same type B) different amounts and same type C) the same amount and opposite type D) different amounts and opposite type 4. What is the name for an atom that has gained or lost an electron? A) ion B) proton C) neutron D) positron
5. During a physics lab, a plastic strip was rubbed with cotton and became positively charged. The correct explanation for why the plastic strip becomes positively charged is that A) the plastic strip acquired extra protons from the cotton. B) the plastic strip lost neutrons to the cotton. C) protons were created as a result of the charging process. D) the plastic strip lost electrons to the cotton. 6. Metals are generally good conductors of electricity because they have A) extra electrons. B) energetic electrons. C) free electrons. D) induced electrons. 7. The electroscope and electrometer are devices used to A) measure the electrical conductivity of a metal. B) detect the presence of electric charge. C) polarize insulating materials. D) charge materials by induction. 8. The magnitude of the electric force between two point charges is calculated using A) Newton's second law B) Coulomb's law C) Faraday's law D) the principle of superposition 9. The SI unit of measurement for electric charge is the A) ampere B) watt C) coulomb D) joule 10. The value 1.6 x 10-19 is significant in physics because it represents A) the mass of an electron. B) the permittivity of free space. C) the electric force between a proton and an electron. D) the amount of charge carried by a electron.
11. Two point charges (Q 1 = 2.0 x 10-6 C, Q 2 = 4.0 x 10-6 C) are separated by a distance of 0.20 m. Calculate the magnitude of the electric force that one charge exerts on the other. A) 0.36 N B) 1.8 N C) 2.1 N D) 3.6 N 12. Two charged objects (A and B) are placed some distance away from each other. Object A has twice the amount of charge as object B. If object A exerts an electric force on object B of 4.0 N to the right, then object B will exert an electric force on object A of A) 2.0 N to the left B) 4.0 N to the right C) 4.0 N to the left D) 8.0 N to the left 13. The mathematical form of Coulomb's law is similar to A) Newton's second law B) Newton's law of universal gravitation C) the law of energy conservation D) the law of momentum conservation 14. Two vectors are added using the head-to-tail method, as shown below. Calculate the magnitude of the resultant vector. A) 2.8 B) 3.3 C) 3.7 D) 4.1 3.2 1.8 15. Refer to the previous question. Determine the direction of the resultant vector. A) 27 B) 29 C) 31 D) 33 16. Calculate the horizontal component of the vector shown below. A) 6.0 B) 8.2 C) 9.5 D) 10.4 12 30
17. Two vectors are added using the head-to-tail method, as shown below. Calculate the magnitude of the resultant vector. A) 3.7 B) 4.4 C) 4.9 D) 5.4 3.2 1.8 60 18. Refer to the previous question. Determine the direction of the resultant vector. A) 17 B) 19 C) 21 D) 23 19. The concept of the electric field was developed by A) Newton B) Coulomb C) Franklin D) Faraday 20. What units are used to express the magnitude of an electric field? A) newtons B) joules C) newtons per coulomb D) joules per coulomb 21. Calculate the magnitude of the electric force experienced by a particle with a charge of 4.2 x 10-6 C when it is placed in a location where the electric field strength is 5400 N/C. A) 7.8 x 10-10 N B) 2.3 x 10-2 N C) 2.3 x 10 4 N D) 1.3 x 10 9 N 22. The electric field a particular point in space points to the right. If an electron is placed at this location, it will experience A) an electric force to the right B) an electric force to the left C) an electric force upward D) no electric force
23. The electric field surrounding a positive point charge is directed A) away from the charge B) towards the charge 24. The electric field surrounding a negative point charge is directed A) away from the charge B) towards the charge 25. Calculate the magnitude of the electric field at a point located 0.40 m away from a 6.0 x 10-6 C point charge. A) 0.81 N/C B) 2.0 N/C C) 1.4 x 10 5 N/C D) 3.4 x 10 5 N/C 26. Two point charges (Q 1 = 3.0 x 10-6 C, Q 2 = 6.0 x 10-6 C) are separated by a distance of 0.20 m. Calculate the magnitude of the net electric field at a point halfway between the two charges. A) 4.0 N/C B) 6.8 x 10 5 N/C C) 2.7 x 10 6 N/C D) 8.1 x 10 6 N/C 27. A person walks 80 m to the east, then turns around and walks 50 m to the west. How far is the person from her starting point? A) 30 m B) 50 m C) 80 m D) 130 m 28. If a plane can fly at an average speed of 640 km/h, how long will it take to travel a distance of 2000 km? A) 0.32 hours B) 1.7 hours C) 3.1 hours D) 5.2 hours
29. Calculate the change in position when an object moves from x = 5.0 m to x = -2.0 m. A) -7.0 m B) +7.0 m C) -3.0 m D) +3.0 m 30. Determine the average velocity of a car that travels from x = 25.0 m to x = 60.0 m in a time interval of 14 seconds. A) -2.5 m/s B) 2.5 m/s C) 0.40 m/s D) 35 m 31. If an object has an acceleration of 5 miles per hour per second, this means that for every second that passes, its velocity increases by A) 5 miles B) 5 miles per hour C) 5 miles per second D) 5 seconds 32. Determine the average acceleration of a car that increases its velocity from 5 m/s to 25 m/s in a time interval of 6 seconds. A) 3.3 m/s 2 B) -3.3 m/s 2 C) 2.7 m/s 2 D) -4.1 m/s 2 33. Determine the final velocity of a motorcycle that accelerates from rest at a rate of 4.0 m/s 2 for 7.0 seconds. A) 11 m/s B) 21 m/s C) 28 m/s D) 56 m/s
34. Calculate the distance traveled in 4.3 s by an object that accelerates from rest in a straight line at a rate of 2.8 m/s 2. A) 6.0 m B) 12 m C) 17 m D) 26 m 35. A 20-kg box is pushed to the right across a floor by a force of 50 N. A friction force of 38 N acts in the opposite direction. Calculate the acceleration of the box. A) 0.60 m/s 2 B) 1.9 m/s 2 C) 2.5 m/s 2 D) 4.0 m/s 2 36. Calculate the kinetic energy of a particle that has a mass of 0.43 kg and is moving at a speed of 27 m/s. A) 5.8 J B) 11.6 J C) 157 J D) 364 J 37. Calculate the speed of an object that has a mass of 6.2 kg and is moving with a momentum of 9.4 kg m/s. A) 0.67 m/s B) 1.5 m/s C) 3.2 m/s D) 58 m/s 38. A 20-kg cart initially at rest is pushed with a force of 60 N through a distance of 4.0 m. How much kinetic energy will the cart have at the end of the 4.0 meters? A) 80 J B) 120 J C) 240 J D) 320 J
39. How much power is needed to lift a 1000-N object to a height of 2.0 m in 4 seconds? A) 2000 W B) 500 W C) 200 W D) 100 W 40. At a given location on the Earth and in the absence of air resistance, all objects fall with the same constant. A) acceleration B) velocity C) kinetic energy D) momentum 41. What is 75 m in units of kilometers? A) 750 km B) 7.5 km C) 0.75 km D) 0.075 km 42. How many meters is 6.5 cm? A) 65 m B) 0.65 m C) 0.065 m D) 0.0065 m 43. The diameter of the Earth is 12,742 km. Estimate how many days it would take to walk around the Earth if you walk for 10 hours per day at a rate of 4 km/h. (Ignore the fact that most of the Earth is covered with water.) A) 500 days B) 1000 days C) 5000 days D) 10,000 days 44. Use the quadratic formula to solve the following equation for t: -4.9t 2 +30t + 100 = 0
45. Determine the slope of each line in the graph shown below. 35 30 25 Position (m) 20 15 10 5 0 0 1 2 3 4 5 6 7 8 Time (s)