AP Physics - Unit 1 - Kinematics

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motion is ____

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18 Terms

1

motion is ____

relative

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2

relative velocity

when two objects are going the same direction, subtract their speeds

when two objects are going opposite directions, add their speeds

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3

vector quantities

  • velocity

  • displacement

  • weight

  • force

  • acceleration

  • momentum

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4

scalar quantities

  • distance

  • speed

  • mass

  • time

  • temperature

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5

displacement

∆x = xf - xi

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6

average velocity

v = ∆x / t

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7

average speed

v = x / t

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8

acceleration

a = ∆v / t

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9

velocity = slope of _____ curve

position (x vs t)

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10

acceleration = slope of _______ curve

velocity (v vs t)

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11

a due to gravity =

9.81 m/s²

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12

if a is negative, x vs. t is concave _____

down

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13

if a is positive, x vs. t is concave ______

up

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14

if a is constant, the v vs. t graph is a ________ line

straight

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15

what force does free fall include?

gravity (neglecting air resistance)

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16

_______ fall into this category when discussing 2d motion

projectiles

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17

projectiles

any object thrown into space upon which the only acting force is gravity (ex. ball being thrown)

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18

can you free fall even if you’re going upward?

yes

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