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AP Physics 1 > Work/Energy > Flashcards

Work/Energy Flashcards

1
Q

What is the equation for impulse?

A

Δp=FΔt

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2
Q

What is Work?

A

Means by which energy is transferred (units= Joules)

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3
Q

What is Energy?

A

The ability to do work

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4
Q

What is the equation for work?

A

W=Fd

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5
Q

What is Impulse?

A

Product of force and time; proportional to the product of mass and velocity

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6
Q

What does the area of a force vs displacement graph represent?

A

Work; Fd

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7
Q

What is Power?

A

Rate at which work is done; expressed as number of Joules per second or Watts (W)

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8
Q

What is the equation for power?

A

P=W/t or P=F(d/t) or P=Fv

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9
Q

What is Kinetic Energy?

A

Energy an object has by being in motion relative to a frame of reference

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10
Q

What is the equation for Kinetic Energy?

A

Ke=1/2mv^2

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11
Q

What is Potential Energy?

A

Stored energy related to the position of an object in a frame of reference

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12
Q

What is the equation for potential energy?

A

Pe/Ug=mgh

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13
Q

What is the Work-Energy Theorem?

A

Work done by the sum of all forces acting on an object is equal to the change in that object’s kinetic energy; W=ΔKe and W=ΔPe

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14
Q

In the absence of frictional forces, total mechanical energy is _______________.

A

Conserved; equal before and after the motion; ΔPe=ΔKe or mgh=1/2mv^2

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15
Q

What is Mechanical Energy?

A

Sum of potential energy and kinetic energy; total energy of an object/system

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16
Q

What is a Conservative Force?

A

Work done by an object is is independent from the path it takes; mechanical energy is conserved and remains constant with time

17
Q

What is a Nonconservative Force?

A

Work done by an object is not independent from the path it takes

18
Q

What is an example of a nonconservative force?

A

Friction or Air Resistance

19
Q

What is the equation for nonconservative forces?

A

W=E2-E1

20
Q

What is the equation for conservation of a spring?

A

1/2mv^2=1/2kx^2

21
Q

In what circumstance is there no work even though there is force?

A

The force is not parallel to the motion; the force is perpendicular to the motion

22
Q

For work, in what direction does the force have to be?

A

Parallel to the motion; in the direction of the motion

AP Physics 1 (14 decks)

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