DATE: NAME: CLASS:
BLM 5-8
ASSESSMENT
Chapter 5 Test
Goal
Demonstrate your understanding of the information presented in Chapter 5.What to Do
Carefully read the instructions before answering each set of questions.
True/False
On the line provided, indicate whether each statement is true (T) or false (F). If the statement is false, rewrite it to make it true.
_____ 1. Scalar quantities have magnitude and direction.
_____ 2. The speed of an object is always the magnitude of its velocity.
_____ 3. When you do negative work on an object, you can reduce its kinetic energy.
_____ 4. Nuclear potential energy is stored in the form of mass.
Matching
Match each description in column A with the correct form of potential energy in column B. Write the letter for the form of potential energy on the line beside the description.
A
___ 6. stored in the water behind a dam
___ 7. released when a compound undergoes a spontaneous reaction to form another compound
___ 8. stored as a result of the position or condition of an object ___ 9. released when mass is converted into energy
___ 10. stored by bending, compressing, or stretching an object
B
(a) all forms of potential energy (b) elastic potential energy (c) chemical potential energy (d) nuclear potential energy (e) gravitational potential energy
Fill in the Blanks
Complete each sentence with the correct term.
11. Displacement is the difference between two _________________.
12. The slope of a velocity versus time graph is equal to the _________________.
13. If you double the velocity of an object, its kinetic energy increases by a factor of _____.
14. If you took an object from Earth to the Moon, its _____ would remain the same but its _____ would be smaller. 15. The term h in the formula for gravitational potential energy refers to the _________ distance of the object
DATE: NAME: CLASS:
BLM 5-8
ASSESSMENT
Chapter 5 Test
(continued)
Multiple Choice
Circle the letter for the choice that best completes the statement or answers the question. 16. The distance that an object travels between two points is
(a) always the same as the magnitude of its displacement (b) never the same as the magnitude of its displacement
(c) always the greater than as the magnitude of its displacement (d) sometimes the same as the magnitude of its displacement
17. When an object is moving at a constant positive velocity, its position versus time graph is (a) a horizontal line
(b) a straight line sloping upward (c) a straight line sloping downward. (d) a curved line sloping upward
18. If the position versus time graph of an object is a curved line sloping downward, its velocity versus time graph can be
(a) horizontal
(b) a straight line sloping upward (c) a straight line sloping downward (d) a curved line sloping upward
19. If you double the mass of a moving object without changing anything else, (a) its kinetic energy doubles
(b) its kinetic energy increases by a factor of four (c) its kinetic energy decreases by half
(d) its kinetic energy is unchanged 20. Negative work
(a) does not exist
(b) can reduce an object’s kinetic energy (c) can increase an object’s kinetic energy (d) cannot affect an object’s kinetic energy
21. An isolated railroad car, filled with sand, is rolling slowly along level tracks. The friction on the railroad car is so small that it has almost no effect on the velocity of the car. If a hole develops in the centre of the bottom of the car, and sand begins to flow out of the car onto the ground between the tracks,
(a) this will have no effect on the motion of the railroad car (b) the railroad car will gradually slow down
23. Which statement about gravity is not true.
(a) Gravity exists only on planets, stars, and moons. (b) Gravity is a property of all masses.
(c) Gravity can do work on a boulder.
(d) When an object is sitting still on a table, gravity is acting on it. 24. Which statement about nuclear potential energy is not true?
(a) The sum of the masses of fission products and the accompanying neutrons is greater than the mass of the original nucleus plus a neutron.
(b) The sum of the masses of fission products and the accompanying neutrons is smaller than the mass of the original nucleus plus a neutron.
(c) Nuclear fission occurs only in very large nuclei, such as uranium and plutonium nuclei. (d) Mass is converted to energy in a nuclear reaction.
25. Which statement about chemical potential energy is not true? (a) All chemical reactions release energy when they proceed. (b) Some chemical reactions release energy when they proceed.
(c) Some chemical reactions require an input of energy in order to proceed.
(d) Nearly all chemical reactions that form compounds from their elements release energy when they proceed.
Numerical Response
Record the answer to each numerical-response question as indicated.
26. While driving to Red Deer on a trip with your family, you notice a sign that says “Medicine Hat 215 km.” You check your watch and see that the time is 7:35 p.m. Later, you see another sign that says “Medicine Hat 27 km.” You check your watch again and see that the time is now 9:30 p.m. What was your average speed for the time interval? Record your two-digit number in the numerical-response box.
27. A 3.2 kg bowling ball is rolling down the alley with a speed of 1.6 m/s. How fast will a 210 g billiard ball have to be moving to have the same kinetic energy as the bowling ball? Record your two-digit number and the decimal point in the numerical-response box.
DATE: NAME: CLASS:
BLM 5-8
ASSESSMENT
Chapter 5 Test
(continued)
Long Answer
Answer the following question in the space provided. Be sure to use complete sentences.
on the vertical distance between the two heights.
6. (e)
7. (c)
8. (a)
9. (d)
10. (b)
11. position vectors 12. acceleration
13. four
14. mass, weight
15. vertical
16. (d)
17. (b)
18. (c)
19. (a)
20. (b)
21. (c)
22. (d)
23. (a)
24. (a)
25. (a)
26. 27
27. 6.2
28. 1.69 106 J
