Week 1: Electric Force Flashcards

1
Q

Electric Constant, k_e

A

9x10^9 N*m^2/C^2

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2
Q

Units of Force

A

N, Newton

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3
Q

nm to meters

A

x10-9 meters

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4
Q

Direction of Electric Force

A

r hat

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5
Q

r hat

A

direction along the line connecting 2 charges

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6
Q

‘hat’

A

indicates direction, does not change magnitude

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7
Q

Unit of length

A

m, meters

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8
Q

acceleration is…

A

time derivative of velocity

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9
Q

x, y, z in phys notation

A

i, j, k

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10
Q

Electric force equation

A

F = k q1 q2/r^2 x r hat

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11
Q

How to sum of forces

A

Break forces into components and add like components

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12
Q

Sine defined in terms of the legs of a right triangle

A

Opposite/ Hypotenuse

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13
Q

Cosine defined in terms of the legs of a right triangle

A

Adjacent/Hypotenuse

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14
Q

r hat definition

A

Direction of line connecting 2 charges

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15
Q

nm in scientific notation

A

x10^-9 meters

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16
Q

gravity

A

g=9.81 m/s^2

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17
Q

Charge of Proton

A

1.6 x 10^-19 C

18
Q

Unit of Charge (q)

A

C, Coulombs

19
Q

Newtons 2nd Law

A

Sum of F=ma

20
Q

Unit Prefix -pico

21
Q

Variable for x direction

22
Q

Variable for y direcition

23
Q

r hat

A

(rhat) = horizontal component * (ihat) + vertical component * (jhat)

24
Q

Avogadro’s number

A

6.02 x 10^23

25
Superposition
Forces linearly add
26
Tangent defined in terms of triangle legs
Opposite/Adjacent
27
Opposite electric charges
Attract
28
Same Electric Charge
Repel
29
What is r variable in electric force equation?
Distance bewteen two particles
30
How to know which direction r^ (hat) is pointing in?
Points towards particle that you are trying to find the force acted upon
31
Unit of charge
coulomb
32
What is a force?
Acts on a pair of objects / Interaction
33
milli
10^-3
34
kilo
10^3
35
Acceleration defintion
Change in velocity over time
36
Fnet
ΣF (sum of forces)
37
conserving electric charge means:
the total sum of the negative and positive charge in the universe does not change
38
charge of a neutron
no charge
39
Coulumbs Law
F=(k_e q1 q2/r^2) r hat
40
micro
10^-6
41
Newton's Third Law
Forces come in equal and opposite pairs and result from an interaction between two particles.
42
Newton's First Law
An object in motion stays in motion; an object at rest stays at rest, unless a net outside force acts on it