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Ap Physics I > Chapter 6 Vocab > Flashcards

Chapter 6 Vocab Flashcards

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1
Q

Work

A

Force times distance

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2
Q

Net work

A

Change in kinetic energy of object

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3
Q

Positive work

A

When force is acted on in the same direction of motion

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4
Q

Negative work

A

When force is acted on in the opposite direction of motion

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5
Q

Joule

A

Nm, unit of work

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6
Q

Kinetic energy

A

Energy of motion

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7
Q

Work-energy principle

A

Net work= change in kinetic energy

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8
Q

Potential energy

A

Energy associated with forces that depend on position or configuration of an object relative to surroundings

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9
Q

Spring constant

A

Spring stiffness constant used to measure stiffness of a spring

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10
Q

Spring equation

A

Fs =-kx, finds out force of spring

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11
Q

Hooke’s law

A

Spring equation

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12
Q

Elastic potential energy

A

Potential energy stored as a form of deformation by an elastic object

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13
Q

Conservative forces

A

When force does not depend on the path taken but the initial and final positions (gravity)

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14
Q

Nonconservative forces

A

Work that depends on path (friction, push/pull)

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15
Q

Total Mechanical energy

A

Sum of kinetic and potential energy at any moment

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16
Q

Mechanical energy

A

Sum of kinetic and potential

17
Q

Conserved quantity

A

Total mechanics energy of a system

18
Q

Principle of conservation of mechanical energy

A

If only conservative forces do work, the total mechanical energy of a system neither increases nor decreases in any process. It stays constant and conserved.

19
Q

Law of conservation of energy

A

No energy is gained/ lost in any process. It can be transformed and transferred but the total amount is constant

20
Q

Dissipative forces

A

Energy is lost from a system when motion takes place

21
Q

Power

A

Rate at which work is done

22
Q

Horsepower

A

Unit of power (550ft*lb/sec)

23
Q

Watt

A

Measure of power (J/sec)

24
Q

Efficiency

A

Ratio of useful power output of engine to power input

25
Q

Force

A

Any kind of push or pull on an object

26
Q

Gravitational potential energy

A

Product of object’s weight (mg) and its height (y above some several levels)

Ap Physics I (2 decks)

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