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ASU / Physics / PHY 101 / The matter is made of what?

# The matter is made of what? Description

##### Description: These notes cover the topics of the first test. Matter is made of atoms, universal gravitation, Coulomb's Law, velocity, Newton's First Law, acceleration, and Newton's Second Law.
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1. Matter is Made of Atoms

Find the number of atoms in a

neutral com

? First you must know the mass of the object and the type of atom

820 820

209 nucleons Pby milkg

: 1 kg

Pbatom

W

## What is the universal gravitation?

80

Und

Nauc= 200 nucleons/atom

Nmuc: # of nucleons If you want to learn more check out In ancient greece, where was the sanctuary of apollo located?

1. per atom

: 207 auckons latom Im Auc= mass of a nucleon

01.6910-27kg /nuelion N Noct of nucleons in the ball

First find of nucleous in the ball. Use a unit arguement. Since the

## What was galileos's famous experiment?

Magnucleon - # of nucleons) Don't forget about the age old question of What are vertical asymptotes?

7

mus

Natom

# of atoms in the ball

1.69x1091kgh Now find the number of atoms in the ball = 5.988+1026 nucleons

con

Vic a unit arguement

Since nuctions Iball - utom an

nucherul atoms ball

VUG

Nuc

: 5.988 = 1024 nuclens

207 hooleons /atom =2.8128 x 1024 atoms In 3 trillion trillion)

Understand how to find protons and neutrons. (Understand periodic table) We also discuss several other topics like What are the sources of socialization?

2. Universal Gravitation

Not to scale

.

Consider a ball of mass m in contact with nothing near in Earth's surface

i Up me Find size of the Acc. o

- y Acc. (FG, ME

Perly and Law for

Frut ma

G

ema na

Mare in makes no difference

n man mo

met

C.67-16*Ng(169 my If you want to learn more check out In biology, what are the mechanical defenses?
Don't forget about the age old question of In chemistry, what are alpha particles?

- 9.80 Wien

= 9.80 kg mle" lega mer

Mass Is resistance to ACC, or INERTIA. More mass means bigger GRAVITY FORCES, but also bigger RESISTANCE to ACC => amount of ACC ( under GRAVITY alone) does not change.

Shortcut to find weight:

weight of mass

m at Earth's surface

= 9 Earth = 9.8m/s2 ir Mem

!

smog

AV

Mars 9 Mars = GM = 3.8 m/s2 Moon Grom Germany - 1.6 m/s2 We also discuss several other topics like Who defined what a pirate was in british atlantic colonies?

Moon

oon

moon

3. Coulomb's Law- Like charges repel; unlike charges attract

Be able to add the arrows and determine the force.

1.)

e

C

B

2.)

A c

R F = 0

C FOR B

A FB C

+ CA -

+

FCA

-

.

0.

POR

CA

A B

FACt

-

Foc

Fat

Falipote, c r repelled

Edipolo, c~ attracted

092)

4. Velocity is speed with a specified direction. Galileo's Famous Experiment.

5. Newton's First Law

• An object has a constant velocity. If and only if the total force acting on the object is 0.

• All forces in the visible world are either gravitational or electromagnetic repulsion (EM). For neutral objects the EM forces is only

significant when the objects are "in contact".

• Understand force diagrams.

• In-class example:

For BE = weight of block

-15 N For = size of force on B by ī

Vee Newtonie 12 law of motion. Since the Vel. of Bis constantly vero, the total force on B is jew. B only touches the I, so there are only two forces to add. By ADD the ARROWS, =) the force om bliy Tie UPWAROS, and

Per lege- na sample of Newton's

- 15N 1st Law of Motion

The force on the B by I is 15 N Upwards

6. Acceleration is the RATE of CHANGE of Vel.

acceleration - amount

ar

amount of position change

Est

a

Speed Up

Slow Down

Change Dir.

an

7. Newton's Second Law (check problem in Universal Gravitation)

i. Non-zero total forces are the cause of any and all accelerations. ii. Direction of Acc. and Dir. of total force are the same. iii. Amount of Acc. is the amount of total force divided by the object's mass

a= Fnet/

m or Fnet=ma

mN= kg(m/s)

• In class examples:

net/

net

Jewelry case (J) Riding on MGR (M)

At a constant spred

looking N

To

Fort

Total

force

.

SOU

FM, f

-speeding up

-

a ferit

total force

22N

VFO. CE

KEECH

FM-22N

is for ft Fact

If mass of C is 100kg, and the amount of Acc. is 15 cm/s2= .15m/s2, find the strength of the net force on the C.

- Picture above Mee Newton's and Law.

m = mass of C

-100leg a= amount of Acc.

:.15m/s2

= 15 cm/2 That size of the total force on the

Fretima

(100kg X. 15 m/se)

A

= 15 kg-m/ga

-15N This means the force of the cabinet by the hande is 15N stronger than the

ional force by the floor.

*12 multiple choice questions and 2 written questions*

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