3096 Final Review II
Multiple Choice
Identify the choice that best completes the statement or answers the question.
1. A machine does 20,000 joules of work in 50 seconds. What is its power in watts?
a. 0.0025 W
b. 400 W
c. 20,000 W
d. 1,000,000 W
ANSWER: B
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POINTS:
FEEDBACK:
section 8.2
REF:
2. A 2.0-kg ball rolls down a ramp. If the ball accelerates at a rate of 12 m/s2, the net
force causing the acceleration is:
a. 6 newtons.
b. 10 newtons.
c. 12 newtons.
d. 24 newtons.
ANSWER: D
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POINTS:
FEEDBACK:
section 6.2
REF:
3. The smallest particle of an element that retains the identity of the element is a(n):
a. atom.
b. ion.
c. molecule.
d. compound.
ANSWER: A
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POINTS:
FEEDBACK:
section 10.1
REF:
4. Potential energy is energy due to the:
a. speed of an object.
b. height of an object.
c. motion of an object.
d. temperature of an object.
ANSWER: B
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POINTS:
FEEDBACK:
section 7.1
REF:
5. How many centimeters are in a stick 3.0 meters long?
a. 0.3 cm
b. 30 cm
c. 300 cm
d. 3,000 cm
ANSWER: C
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POINTS:
FEEDBACK:
section 1.2
REF:
6. A rock displaces 50 mL of water. The density of the rock is 2.5 g/cm3. What is the
mass of the rock?
a. 0.05 g
b. 20 g
c. 52.5 g
d. 125 g
ANSWER: D
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POINTS:
FEEDBACK:
section 2.2
REF:
7. A plastic toy with a mass of 18 grams occupies 9.0 cm3 of space. Its density is:
a. 0.3 g/cm3
b. 1.5 g/cm3
c. 2.0 g/cm3
d. 6.0 g/cm3
ANSWER: C
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POINTS:
FEEDBACK:
section 2.2
REF:
8. Natalie lifts a 15-kg rock from the ground onto a 1.5 meter high wall. What is the
amount of potential energy she has given the rock?
a. 10 joules
b. 23 joules
c. 220 joules
d. 2,200 joules
ANSWER: C
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POINTS:
FEEDBACK:
section 7.1
REF:
9. When energy in a system is transformed, what happens to the total amount of
energy in the system?
a. It increases.
b. It stays the same.
c. It goes to zero.
d. It decreases.
ANSWER: B
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POINTS:
FEEDBACK:
section 7.2
REF:
10. Batteries are devices that change chemical energy to ____ energy.
a. radiant
b. mechanical
c. nuclear
d. electrical
ANSWER: D
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POINTS:
FEEDBACK:
section 7.1
REF:
11. What is the momentum of a 0.15-kilogram baseball moving at 20 m/s?
a. 1.5 kg·m/s
b. 3 kg·m/s
c. 15 kg·m/s
d. 30 kg·m/s
ANSWER: B
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POINTS:
FEEDBACK:
section 6.3
REF:
12. A 0.15-kilogram baseball and a 7.25-kilogram bowling ball are both rolling along at
3 m/s. Which object is easier to stop and why?
a. The baseball because it has more inertia
b. The bowling ball because heavy objects are naturally prone to stop on their
own
c. The baseball because it has less inertia
d. The bowling ball because it has less inertia
ANSWER: C
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POINTS:
FEEDBACK:
section 6.1
REF:
13. A transverse wave:
a. has enough energy to travel at least 5,000 kilometers.
b. lasts no longer than one minute.
c. oscillates perpendicular to the direction of wave travel.
d. oscillates in the same direction as the direction of wave travel.
ANSWER: C
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POINTS:
FEEDBACK:
section 23.3
REF:
14. Friction between two surfaces transforms energy of motion directly to:
a. thermal energy.
b. electric energy.
c. chemical energy.
d. nuclear energy.
ANSWER: A
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POINTS:
FEEDBACK:
section 7.2
REF:
15. In a mechanical system, the distance an oscillator moves from its average position
is called:
a. amplitude.
b. period.
c. frequency.
d. cycle.
ANSWER: A
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POINTS:
FEEDBACK:
section 23.1
REF:
16. If you go twice as fast, your kinetic energy becomes:
a. 2 times smaller.
b. 4 times smaller.
c. 2 times bigger.
d. 4 times bigger.
ANSWER: D
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POINTS:
FEEDBACK:
section 7.1
REF:
17. “Forces occur in pairs” is another way of stating Newton’s:
a. first law of motion.
b. second law of motion.
c. third law of motion.
d. universal law of motion.
ANSWER: C
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POINTS:
FEEDBACK:
section 6.3
REF:
18. When the forces on an object are balanced, we say that the object:
a. is in equilibrium.
b. must be moving at a constant speed.
c. must be at rest.
d. is accelerating.
ANSWER: A
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POINTS:
FEEDBACK:
section 5.3
REF:
19. The second row of the periodic table has 8 elements because:
a. there are 8 protons in the nucleus of oxygen.
b. the second energy level can hold 8 electrons.
c. 8 is 2 ´ 2 ´ 2
d. the first row has 7 elements and the third row has 9 elements.
ANSWER: B
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POINTS:
FEEDBACK:
section 15.1
REF:
20. In a machine, work output:
a. can be calculated by dividing output distance by output force.
b. is always equal to the work input.
c. can be calculated by multiplying output force by output distance.
d. is always greater than the work input.
ANSWER:
POINTS:
C
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FEEDBACK:
section 9.1
REF:
21. The inertia of an object is related to its:
a. mass and speed.
b. mass only.
c. speed only.
d. mass and force.
ANSWER: B
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POINTS:
FEEDBACK:
section 6.1
REF:
22. Which of the following use the same units of measurement?
a. Force and work
b. Energy and work
c. Power and energy
d. Power and work
ANSWER: B
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POINTS:
FEEDBACK:
section 8.1
REF:
23. The amount of time required for one cycle to occur is called the:
a. amplitude.
b. harmonic.
c. frequency.
d. period.
ANSWER: D
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POINTS:
FEEDBACK:
section 23.1
REF:
24. The efficiency of a machine is usually expressed in:
a. watts.
b. joules.
c. percent.
d. newton-meters.
ANSWER: C
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POINTS:
FEEDBACK:
section 8.2
REF:
25. A unit used to measure power is the:
a. watt.
b. newtons per second.
c. newton-meter.
d. joule.
ANSWER: A
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POINTS:
FEEDBACK:
section 8.2
REF:
26. A force that resists motion is called:
a. weight.
b. friction.
c. motion.
d. equilibrium.
ANSWER: B
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POINTS:
FEEDBACK:
section 5.2
REF:
27. On a graph, all of the following directions are normally considered to be positive
EXCEPT:
a. Left.
b. East.
c. Up.
d. North.
ANSWER: A
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POINTS:
FEEDBACK:
section 4.1
REF:
28. Jake, who weighs 680 newtons, climbs a 6 meter ladder in 8 seconds. What was
Jake’s power?
a. 510 watts
b. 4080 watts
c. 5440 watts
d. 32640 watts
ANSWER: A
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POINTS:
FEEDBACK:
section 8.1
REF:
29. Which of the following is NOT a property of waves?
a. Frequency
b. Weight
c. Speed
d. Amplitude
ANSWER: B
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POINTS:
FEEDBACK:
section 23.2
REF:
30. What is required to get work out of a machine?
a. Input work
b. Friction
c. Gears
d. Efficiency
ANSWER: A
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POINTS:
FEEDBACK:
section 9.1
REF:
31. Which point on this position vs. time graph has the fastest speed?
a.
b.
c.
d.
Point 1
Point 2
Point 3
Point 4
ANSWER: B
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POINTS:
FEEDBACK:
section 4.2
REF:
32. The "building blocks" of matter are:
a. atoms and molecules.
b. electrons.
c. found only in the plasma state.
d. as of yet undiscovered.
ANSWER: A
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POINTS:
FEEDBACK:
section 14.1
REF:
33. The wavelength of a wave is defined as:
a. one-half the distance from crest to crest.
b. the distance from crest to crest.
c. how often a wave goes up and down.
d. the distance between the highest and lowest parts of a wave.
ANSWER: B
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POINTS:
FEEDBACK:
section 23.2
REF:
34. Which of the following diagrams shows the force vector -2 N?
a.
b.
c.
d.
A
C
B
D
ANSWER: B
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POINTS:
FEEDBACK:
section 5.1
REF:
35. Of the following measurements, the one that would be incomplete without giving a
direction is:
a. time.
b. force.
c. temperature.
d. length.
ANSWER: B
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POINTS:
FEEDBACK:
section 5.1
REF:
36. When constructing a graph, the x-axis is most closely related to:
a. the vertical axis.
b. the dependent variable.
c. the independent variable.
d. the slope.
ANSWER: C
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POINTS:
FEEDBACK:
section 4.2
REF:
37. Which factor listed below has the greatest effect on the period of a pendulum?
a. Mass of the pendulum
b. Angle of the pendulum
c. Amplitude of the oscillations
d. Length of the string
ANSWER: D
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POINTS:
FEEDBACK:
section 23.1
REF:
38. Work may be measured using units of:
a. joules.
b. newtons per second.
c. newtons.
d. watts.
ANSWER: A
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POINTS:
FEEDBACK:
section 8.1
REF:
39. Transferring or sharing electrons between atoms forms:
a. alloys.
b. mixtures.
c. bonds.
d. solutions.
ANSWER: C
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POINTS:
FEEDBACK:
section 16.1
REF:
40. As a box is sliding down a ramp, a 10-N force of gravity is pulling the box down
the ramp while a 2-N force of friction acts to stop the box. What is the net force
accelerating the box down the ramp?
a. 5 N
b. 8 N
c. 10 N
d. 12 N
ANSWER: B
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POINTS:
FEEDBACK:
section 5.2
REF:
41. The space that an object takes up is known as its:
a. density.
b. weight.
c. volume.
d. mass.
ANSWER: C
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POINTS:
FEEDBACK:
section 2.1
REF:
42. Do any of the atom diagrams below represent atoms of the same element?
a.
b.
c.
d.
No, they are all different elements.
Yes, atom A and atom B are the same element.
Yes, all of the atoms are the same element.
Yes, atom A and atom C are the same element.
ANSWER: D
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POINTS:
FEEDBACK:
section 14.1
REF:
43. A scientific explanation supported by much evidence collected over a long period
of time is a:
a. law.
b. theory.
c. deduction.
d. hypothesis.
ANSWER: B
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POINTS:
FEEDBACK:
section 3.1
REF:
44. Luka pushes a box across the floor in the direction shown by the arrow in the
diagram below:
The direction of the friction force acting on the box is:
a. left.
b. down.
c. right.
d. up.
ANSWER: A
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POINTS:
FEEDBACK:
section 5.2
REF:
45. What is the most work that can be done with 100 joules of energy?
a. 100 J
b. 1,000 J
c. 10 J
d. 10,000 J
ANSWER: A
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POINTS:
FEEDBACK:
section 8.1
REF:
46. Speed is:
a. calculated by dividing the distance traveled by the time taken.
b. a measure of how quickly an object gets from one place to another.
c. zero for objects at rest.
d. All of the above
ANSWER:
POINTS:
D
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FEEDBACK:
section 4.1
REF:
47. The property of matter that resists changes in motion is:
a. inertia.
b. force.
c. speed.
d. acceleration.
ANSWER: A
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POINTS:
FEEDBACK:
section 6.1
REF:
48. An extended spring stores:
a. kinetic energy.
b. radiant energy.
c. chemical energy.
d. potential energy.
ANSWER: D
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POINTS:
FEEDBACK:
section 7.1
REF:
49. Kinetic energy increases with:
a. mass and distance.
b. speed and time.
c. mass and speed.
d. speed and distance.
ANSWER: C
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POINTS:
FEEDBACK:
section 7.1
REF:
50. Efficiency is defined as the ratio of:
a. work input to the work output.
b. input force to output force.
c. work output to work input.
d. output force to input force.
ANSWER: C
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POINTS:
FEEDBACK:
section 8.2
REF: