IB SL Physics Unit 2: Mechanics

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d, meters (m), scalar

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48 Terms

1

d, meters (m), scalar

distance: symbol, units, s/v

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2

s, m @ theta, vector

displacement: symbol, units, s/v

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3

t, seconds (s), scalar

time: symbol, units, s/v

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4

v, m/s, scalar, v=d/t

speed: symbol, units, s/v, equation

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5

v, m/s @ theta, vector, v=s/t

velocity: symbol, units, s/v, equation

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6

a, m/s^2 @ theta, vector, a=(v-u)/t

acceleration: symbol, units, s/v, equation

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7

j, m/s^3 @ theta, vector, j=(af-ai)/t

jerk: symbol, units, s/v, equation

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8

u, m/s @ theta, vector

initial velocity: symbol, units, s/v

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9

v, m/s @ theta, vector

final velocity: symbol, units, s/v

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10

average velocity

velocity over the total time

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11

instantaneous velocity

velocity at a specific time

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12

uniform velocity

unchanging velocity

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13

projectile

an object influenced by gravity only

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14

inertia

Newton’s First Law: the law of ______

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15

inertia mass

(Newton’s First Law) _______ is dependant on ___

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16

acceleration

Newton’s Second Law: the law of

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17

F=ma

(Newton’s Second Law) equation:

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18

force pair

Newton’s Third Law: the law of

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19

for every action there is an equal and opposite reaction

(Newton’s Third Law): statement

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20

kinetic (dynamic) static

two types of friction: _____ ______, ______

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21

normal

FN = _______ Force

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22

normal force

force 90° to the surface an object is on

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23

R (reactionary force)

Fg = _

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24

mass * gravity

how to find reactionary force (R)

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25

net

FNET = ____ force

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26

net

the sum of all forces is ____ force

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27

net force

translational equilibrium: what is equal to zero?

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28

okay

study the equations for inclined planes!!

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29

pulley net a

for a ________ use the equation

a=(fg2-fg1)/(m1+m2)

or a=f__/__

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30

energy

the ability to do work or cause change

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31

work

force * displacement, measured in Joules

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32

Joules

N*m = kgm²/s²

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33

Kinetic

energy of motion (.5mu²)

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34

potential

energy due to position or composition (chemical, gravitational, elastic, electric, nuclear, magnetic)

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35

both

internal or mechanical energy: kinetic, potential, or both

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36

power

energy/time = J/s = Watt (W)

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37

Hooke’s Law

F=-kx

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38

Energy final

energy initial is always equal to

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39

efficiency

useful energy/total energy = useful power/total power = 34% KE

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40

combustion engine

CPE; KEf +TEf + sound

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41

dam energy conversions

GPEw →KEw→KEt→EE (electrical energy)

<p>GPEw →KEw→KEt→EE (electrical energy)</p>
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42

momentum

mass in motion

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43

m*v

p (momentum) =

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44

impulse

an object’s change in momentum

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45

Ft

J (impulse) =

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46

conserved

momentum is __________ in every collision

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47

inelastic collision

KE is not conserved (real life collisions)

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48

elastic collision

KE is conserved

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