Physics 165 Module 4 Exam Questions
and Answers
Which of the following could be a unit for power?
A) Candelas
B) Horsepower
C) Amperes
D) Volts - Answer- B) Horsepower (and Watts)
Which of the following changes will maximize the work done by a force? - Answer-
Apply the force in the same direction as the displacement
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
When the energy of a system decreases, what type of work is most likely done ON that
system? - Answer- zero work
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
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
True or False: A football is kicked into the air. As it rises, its kinetic energy decreases
and its gravitational potential energy increases. - Answer- true
If you wanted to make the kinetic energy of a thrown ball larger, which TWO of the
following changes would make the kinetic energy of the ball FOUR times bigger? -
Answer- Make the mass of the ball four times bigger, and Double the speed of the ball
Which of the following could be a unit for power?
A) Candelas
B) Horsepower
C) Amperes
, D) Volts - Answer- B) Horsepower (and Watts)
Which of the following changes will maximize the work done by a force? - Answer-
Apply the force in the same direction as the displacement
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
When the energy of a system decreases, what type of work is most likely done ON that
system? - Answer- zero work
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
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
True or False: A football is kicked into the air. As it rises, its kinetic energy decreases
and its gravitational potential energy increases. - Answer- true
If you wanted to make the kinetic energy of a thrown ball larger, which TWO of the
following changes would make the kinetic energy of the ball FOUR times bigger? -
Answer- Make the mass of the ball four times bigger, and Double the speed of the ball
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
What is the process of producing change in the environment called?
A) Energy
B) Force
C) Power
D) Work - Answer- D) Work
What is the unit of both energy and work? - Answer- JOULES
True or False: When you hold a dumbbell in place 3 feet off the ground, work is being
done.
A) True
B) False - Answer- B) False
and Answers
Which of the following could be a unit for power?
A) Candelas
B) Horsepower
C) Amperes
D) Volts - Answer- B) Horsepower (and Watts)
Which of the following changes will maximize the work done by a force? - Answer-
Apply the force in the same direction as the displacement
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
When the energy of a system decreases, what type of work is most likely done ON that
system? - Answer- zero work
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
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
True or False: A football is kicked into the air. As it rises, its kinetic energy decreases
and its gravitational potential energy increases. - Answer- true
If you wanted to make the kinetic energy of a thrown ball larger, which TWO of the
following changes would make the kinetic energy of the ball FOUR times bigger? -
Answer- Make the mass of the ball four times bigger, and Double the speed of the ball
Which of the following could be a unit for power?
A) Candelas
B) Horsepower
C) Amperes
, D) Volts - Answer- B) Horsepower (and Watts)
Which of the following changes will maximize the work done by a force? - Answer-
Apply the force in the same direction as the displacement
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
When the energy of a system decreases, what type of work is most likely done ON that
system? - Answer- zero work
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
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
True or False: A football is kicked into the air. As it rises, its kinetic energy decreases
and its gravitational potential energy increases. - Answer- true
If you wanted to make the kinetic energy of a thrown ball larger, which TWO of the
following changes would make the kinetic energy of the ball FOUR times bigger? -
Answer- Make the mass of the ball four times bigger, and Double the speed of the ball
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
What is the process of producing change in the environment called?
A) Energy
B) Force
C) Power
D) Work - Answer- D) Work
What is the unit of both energy and work? - Answer- JOULES
True or False: When you hold a dumbbell in place 3 feet off the ground, work is being
done.
A) True
B) False - Answer- B) False
