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Physics Q1 > Lesson 14 to 16: Energy > Flashcards

Lesson 14 to 16: Energy Flashcards

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1
Q

What is energy?

A) The ability to move objects
B) The property of objects that move or that have the capacity to move
C) A type of motion
D) A form of work

A

B) The property of objects that move or that have the capacity to move

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2
Q

What are the two main types of energy?

A) Kinetic and mechanical
B) Kinetic and potential
C) Thermal and kinetic
D) Potential and electrical

A

B) Kinetic and potential

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3
Q

What is the SI unit of energy?

A) Newton
B) Watt
C) Joule
D) Erg

A

C) Joule

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4
Q

What is gravitational potential energy?

A) Energy due to motion
B) Energy due to position in a gravitational field
C) Energy due to friction
D) Energy stored in springs

A

B) Energy due to position in a gravitational field

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5
Q

What does the Work-Energy Theorem state?

A) Energy can be created or destroyed
B) Work done by a net force affects the kinetic energy of an object
C) Work is always positive
D) Energy is only transferred, not transformed

A

B) Work done by a net force affects the kinetic energy of an object

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6
Q

If the work done by a net force is negative, what happens to the kinetic energy?

A) It increases
B) It decreases
C) It remains the same
D) It becomes zero

A

B) It decreases

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7
Q

What is power?

A) The amount of work done
B) The rate of doing work or transferring energy
C) The total energy in a system
D) The energy stored in an object

A

B) The rate of doing work or transferring energy

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8
Q

What does the Law of Conservation of Energy state?

A) Energy can be created
B) Energy can only be converted from one form to another
C) Energy can be destroyed
D) Energy is only constant in isolated systems

A

B) Energy can only be converted from one form to another

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9
Q

What defines an isolated system?

A) A system in which energy can leave or enter
B) A system where energy can only enter
C) A system in which no energy can leave or enter
D) A single object with no forces acting on it

A

C) A system in which no energy can leave or enter

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10
Q

Is the Law of Conservation of Energy always true?

A) Yes, it applies in every situation
B) No, it is not always true
C) It is true only in closed systems
D) It is true under specific conditions

A

B) No, it is not always true

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11
Q

What is kinetic energy?

A) Energy due to position
B) Energy due to motion
C) Energy stored in a spring
D) Energy due to temperature

A

B) Energy due to motion

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12
Q

When work done by a net force is zero, what happens to the kinetic energy of an object?

A) It increases
B) It decreases
C) It remains the same
D) It fluctuates

A

C) It remains the same

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13
Q

What does the SI unit of power represent?

A) Work done in one second
B) Energy stored in one second
C) Force applied over time
D) Distance traveled in one second

A

A) Work done in one second

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14
Q

How does power relate to the rate of doing work?

A) The slower the work is done, the greater the power
B) The faster the work is done, the greater the power
C) Power is unrelated to the speed of work
D) Power decreases with increased speed

A

B) The faster the work is done, the greater the power

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15
Q

Which statement is true regarding energy transfer?

A) Energy can be created and destroyed
B) Work is a form of energy transfer
C) Energy is only stored, not transferred
D) Kinetic energy does not involve motion

A

B) Work is a form of energy transfer

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16
Q

In the context of the Work-Energy Theorem, what does a positive work indicate?

A) The kinetic energy of the object increases
B) The kinetic energy of the object decreases
C) The potential energy of the object increases
D) The energy is conserved

A

A) The kinetic energy of the object increases

17
Q

What is the definition of a system in physics?

A) A method of energy transfer
B) A single object or a collection of objects
C) Any object that is moving
D) A state of energy conservation

A

B) A single object or a collection of objects

18
Q

What does it mean for an isolated system?

A) It can exchange energy with its surroundings
B) It cannot exchange energy with its surroundings
C) It is always at rest
D) It is a type of kinetic system

A

B) It cannot exchange energy with its surroundings

19
Q

Which of the following best describes the term “conservation of energy”?

A) Energy is only found in kinetic forms
B) Total energy remains constant in an isolated system
C) Energy can be lost but never gained
D) Energy can be created at will

A

B) Total energy remains constant in an isolated system

20
Q

What happens to energy in a non-isolated system?

A) It remains constant
B) It can leave or enter the system
C) It is always conserved
D) It cannot be transformed

A

B) It can leave or enter the system

Physics Q1 (7 decks)

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