ap physics

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14 Terms

1

define total energy

sum of energies in a system

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2

what is kinetic energy and what affects it?

energy of motion affected by mass and velocity

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3

define potential energy

stored energy of an object due to height or stretch/compression

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4

what is the difference between gravitational and elastic potential energy

gravitational - due to height

elastic - due to stretch/compression

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5

how does thermal energy affect motion of an object

disputes motion in form of friction

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6

difference between energy transformations and transfers

transformations - within a system

transfers - between system and environment

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7

describe basic energy model

energy cannot only be transferred or transformed not created or destroyed

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8

define work

W = F*d

amount of energy transferred in/out of system

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9

define law of conservation of energy

energy cannot be created or destroyed

Kf + Uf + ^ETH = Ki +Ui

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10

what is an isolated system

^E=0 , energy does not transfer in or not

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11

unit for energy and conversion

Joules , = Nm = 1kgm²/s²

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12

rotational vs linear kinetic energy

rotational - motion of a rotating object

linear - straight line motion

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13

conversations vs nonconservative forces

conservative - help store energy

non conservative - didn’t help store energy

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14

define power

rate of work done on or by a system P = W/t

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