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Chapter 5 Review
1. ___________________ is the property that enables something to do work.
2. Energy of motion is called ___________________________.
3. If we have a mass of 5 and a velocity of 2, what is the kinetic energy?
4. Moment of Inertia (I) depends on the ________________________.
5. A wheel has a radius of 3 m, mass of 20 and spins at a speed of 200 rpm. What is the kinetic energy?
6. The _____________________________________ states that when work is done on an object, its kinetic
7. energy changes, and the work done equals the change in kinetic energy.
8. If a 100 kg truck accelerates from 20 to 40 m /s. What work is done by the engine?
9. Energy that is dependent upon height is called _____________________________.
10. A ball is thrown up. At the top of the path, how fast is the ball moving?
11. How much kinetic energy does the ball have at the top of the path?
12. If the ball is thrown to a height of 5 meters and the ball has a mass of 10 grams, what is the PE?
13. Potential energy that is stored in a spring is called _________________________________.
14. The __________________________ of the spring is its unstretched position – where the spring has no
force.
15. Spring constant of 10,000 and the spring is compressed 2 m, what is the elastic potential energy?
16. As a mass accelerates on a spring, the spring’s stored PE is converted to
___________________________.
17. The process with the mass vibrating right to left and back again, changing kinetic to potential and
potential to kinetic is called ______________________________________.
18. When potential energy is converted to kinetic energy, what forces take away some of the energy.
19. The law of _______________________________________ states that in an isolated system, energy is
conserved – it cannot be created or destroyed.
20. What is the total energy of a ball that has a mass of 25 and is dropped from a height of 60 with a velocity
of 10?
21. ________________________________ says that as the velocity of a fluid (such as air) increases, the
pressure in the fluid (air) decreases.
22. The speed of the air above the wing on an airplane is much __________________ than the speed below.
23. The difference in speed of air above and below an airplane wing leads to a _____________ pressure
over the top of the wing and a _______________________ pressure below the wing.
24. A ____________________________ is an electrical device that stores energy in an electric field.
25. A power supply removes ___________________ from one plate in a capacitor and places them on a
second plate.
26. The plate that loses electrons become __________________ charged and the plate that gains electrons
become ______________________ charged.
27. If the charge is 50 and the change in Voltage is 12, what is the work done?
28. If the Capacitance is 2 and the Voltage is 6 V, what is the charge?
29. If the Capacitance is 5 and the Voltage is 12 V, what is the Potential Energy stored?
30. Draw and explain a magnetic field created by a wire.
31. If two currents are in the same direction flowing through a wire, the wires are ____________________
32. If two currents are in opposite directions flowing through a wire, the wires are ____________________
33. A magnetic field can also create an electric field. This is called _______________________________.
34. If a loop of wires move through a magnetic field, a ________________ is produced in the wire.
35. An _____________________ is an electrical device that stores energy in a magnetic field.
36. A coil with an inductance (L) of 2 Hertz produces a current of 10, when current drops in 2 seconds.
What is the EMF?
37. A coil with an inductance of 10 Hertz and a current of 20 A has how much PE stored?
38. ______________________________ is the total kinetic energy of the motion of atoms in an object.
39. All molecules have 3 types of motion:
________________________ movement – forward or backward movement
____________________________ movement – spinning motion
__________________________ – small, fast movements back and forth
40. Temperature of an object is dependent upon ___________________________ movement.
41. The total energy of an object is called the ____________________________________.
42. A body’s internal energy depends on:
43. Internal energy can be transferred from one object to another with a _________________________
difference or by ___________.
44. Another way to transfer energy is by doing work to produce ____________________.
45. Other forms of energy can also be converted into internal energy. Example –
46. The science dealing with relationships between internal energy, heat, and work is called
_________________________________________.
47. The law of conservation of energy says that energy cannot be created or destroyed but can change from
one form of energy to another form. This law is also called the
___________________________________________________________.
48. Heat is 30 and work is 20; what is the change in internal energy?
49. A system that has 20 units of heat entering the system and 40 units of work are done on the system, what
is the internal energy?
50. A system that has 10 units of heat entering the system and the system does 40 units of work, what is the
internal energy?
51. A system that has 30 units of heat leaving the system and 10 units of work are done on the system, what
is the internal energy?
52. A system that has 70 units of heat leaving the system and the system does 40 units of work, what is the
internal energy?
53. A process in which there is no heat transfer to or from the system is called an ________________
process.
54. A device that converts thermal energy into mechanical energy is called a ______________________.
55. List 3 examples of heat engines. One that burns gas, one that uses steam, and one that uses chemicals.
56. Every heat engine must:
______________________ thermal energy form a high-temperature source
_____________________ some of the thermal energy to work
____________________ the remaining thermal energy into a low-temperature reservoir
57. The ________________________________________ says that heat will flow from a body with a
higher temperature to a body at a lower temperature.