PHYSICS 165 MODULE 4 EXAM
1. Which TWO of the following will NOT affect the amount of work you do in
lifting a book onto a shelf?
Answer The path that the book takes as you lift it to the shelf, and the time it takes you to lift it to the
shelf
2. What is the process of producing change in the environment called?
A) Energy
B) Force
C) Power
D) Work
Answer D) Work
3. What is the unit of both energy and work?
Answer JOULES
4. True or False
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20
,When you hold a dumbbell in place 3 feet off the ground, work is being done.
A) True
B) False
Answer B) False
5. Which of the following could be a unit for power?
A) Candelas
B) Horsepower
C) Amperes
D) Volts
Answer B) Horsepower (and Watts)
6. Which of the following changes will maximize the work done by a force?
Answer Apply the force in the same direction as the displacement
7. How can a waiter apply a force to a tray and NOT do any work on it?
Answer Either apply the force in a direction that is perpendicular to the displacement, have no displacement
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20
, 8. When the energy of a system decreases, what type of work is most likely done
ON that system?
Answer zero work
9. When the energy of a system increases, what type of work is most likely done
ON that system?
A) Positive work
B) Negative work
C) Zero work
D) There is no relationship between work and energy
Answer A) Positive work
10. Explain why that force does no work.
Answer Large amount of GRAVITATIONAL FORCE and normal force, but no DISPLACEMENT, so no work
has been done
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20
1. Which TWO of the following will NOT affect the amount of work you do in
lifting a book onto a shelf?
Answer The path that the book takes as you lift it to the shelf, and the time it takes you to lift it to the
shelf
2. What is the process of producing change in the environment called?
A) Energy
B) Force
C) Power
D) Work
Answer D) Work
3. What is the unit of both energy and work?
Answer JOULES
4. True or False
1/
20
,When you hold a dumbbell in place 3 feet off the ground, work is being done.
A) True
B) False
Answer B) False
5. Which of the following could be a unit for power?
A) Candelas
B) Horsepower
C) Amperes
D) Volts
Answer B) Horsepower (and Watts)
6. Which of the following changes will maximize the work done by a force?
Answer Apply the force in the same direction as the displacement
7. How can a waiter apply a force to a tray and NOT do any work on it?
Answer Either apply the force in a direction that is perpendicular to the displacement, have no displacement
2/
20
, 8. When the energy of a system decreases, what type of work is most likely done
ON that system?
Answer zero work
9. When the energy of a system increases, what type of work is most likely done
ON that system?
A) Positive work
B) Negative work
C) Zero work
D) There is no relationship between work and energy
Answer A) Positive work
10. Explain why that force does no work.
Answer Large amount of GRAVITATIONAL FORCE and normal force, but no DISPLACEMENT, so no work
has been done
3/
20
