Youtube daily report Feb 6 2019

It's interesting to see all the different ways how you can tap into

trends, right? Small ones in your niche. Big ones even. All possible obviously for

small channels. But I have to say trends is usually a gamble. I mean if we

compare it to the other growth strategy we had before, evergreen content. Evergreen

content is the much more dependable way to grow a channel. But trends, even though

you have to try it again and again until you hit it big, if you hit it big then

it's usually a huge spike for your channel. Really a level up for your

channel. So it's worth trying out. And I really find it interesting, ingenious

really how some people even find for large trends like the fidgets spinner: Do

you remember the story of the guy who repaired the fidgets spinner? Ingenious,

right? We have this large trend and because it's so much buzz about it,

people are starting to get interested in related topics. And of course, I mean, all

have those fidget spinners and since there are cheap plastic they break at

some point. So suddenly something like a subtrend – the big trend is the

fidgets spinner, the subtrend is the fidgets spinner breaking and people

wanting to know how to repair it. And that's how he tapped into the huge trend.

Ingenious, right? And talking about trends: I mean it's a whole buzz and many YouTube

creators create videos about it. Why not combine it with collaborations?! I mean we

all focus on those trends at the same time anyway, right? So we come to our next

growth strategy. That is collaborations. And let me say this: We usually think

about collaborations only that we do a video together. A livestream for example

where we are both in the video and do the livestream together.

Or we do two videos. One on my channel are one of on your channel, right? These

are the common things, are ways to do collaborations. But it's by far not the

only way how you can do collaborations. Let me show

you. The next video in this playlist is all about the different ways how you can

collaborate and depending on which way you choose, different effects will then

take hold. It's really interesting to see. Roll it right now and see you after

the video again.

For more infomation >> How To Collab With Other Youtubers - Duration: 2:35.

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For more infomation >> Perspektive zeichnen lernen - Haus konstruieren - Teil 3.2 - Duration: 11:38.

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PERCEPTION CAROLINA 14 FT KAYAK REVIEW - Duration: 2:02.

PERCEPTION CAROLINA 14 REVIEW

For more infomation >> PERCEPTION CAROLINA 14 FT KAYAK REVIEW - Duration: 2:02.

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For more infomation >> Belen Rodriguez tra le braccia di Stefano De Martino, lo scoop | Wind Zuiden - Duration: 4:35.

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Mercedes-Benz SLK-Klasse 200 K. Navigatie Airco Telefoon Tempomaat 164PK Leder Stoelverwarming - Duration: 1:11.

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MIGRANT CARAVAN Update - Border Security IS Ready - Duration: 5:40.

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2000'S DANCEHALL MIX DJ TREASURE EPISODE 2: Vybz Kartel/Mavado/Busy Signal[FEBRUARY 2019]18764807131 - Duration: 21:36.

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For more infomation >> 2000'S DANCEHALL MIX DJ TREASURE EPISODE 2: Vybz Kartel/Mavado/Busy Signal[FEBRUARY 2019]18764807131 - Duration: 21:36.

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What is the Work-Energy Theorem? | Physics in Motion - Duration: 6:04.

♪♪

>> Work means a lot of things

to a lot of people.

In physics, work has

a specific meaning.

Work equals force

times displacement.

I'm using my force

to move this cell phone

across the table.

That's work.

Moving a product

to market is work.

Moving a rocket into

space is work, too.

How much energy do you need to

propel that rocket into space?

How much gas, which possesses

stored chemical energy,

do you need to drive across

the United States in your car?

Or how much energy do you need

to keep this manufacturing plant

assembly line in operation?

That's what the

Work-Energy Theorem

helps you figure out.

It took about 2,000 years

to figure out that forces

are what make objects

move and stop.

When I roll this ball

on the table,

do you think it'll stop?

Greek philosopher,

Aristotle, did.

In Aristotle's days,

around 320 B.C.,

he thought objects would just

naturally slow down and stop.

It wasn't until Sir Isaac Newton

came along almost

2,000 years later

that he figured out that

forces like friction that

are harder to see and measure

are acting on the ball

and slowing it down,

or other forces speeding it up.

It's Newton's

First Law of Motion.

An object at rest

will stay at rest

and an object in motion

will stay in motion

at a constant velocity,

unless acted upon

by a net force.

So without friction,

this ball would just

keep on rolling.

Newton understood

forces acting on masses,

but he didn't really take

into account energy's impact

on how things move.

That took years more

to figure out.

And in the world

we're living in,

with industry and technology,

energy is critical.

The key to the Work-Energy

Theorem is understanding that

the work you do on an object

will either add energy

to that object

or take energy away.

Remember, work equals

force times displacement.

So let's say I want to

move this box two meters.

If I exert 20 newtons of force

on the box to move it 2 meters,

then I'm doing 40 joules

of work on the box.

By pushing the box

and increasing its velocity,

the box gains 40 joules

of kinetic energy.

Kinetic energy is the energy

of a moving object.

That's the Work-Energy

Theorem in a nutshell.

Work is equal to the change in

that object's kinetic energy.

Kinetic energy is equal

to 1/2 your mass times

its velocity squared.

The delta symbol

means a change in.

That means work is equal

to the final kinetic energy

minus the initial

kinetic energy.

The key is,

it has to be displaced.

If you move it,

then return it to the same spot,

no work is done.

Why are forces like

friction important?

Well, if you want to know

how much friction slows down

a runner sliding into base,

or how big a parachute you need

to slow down this shuttle,

or how fast a train

can safely take a curve

without flying off the tracks,

the Work-Energy Theorem

can help you figure out

those problems.

And in each of those instances,

friction is a key force.

Friction is one of those forces

that's difficult to measure.

It takes away from

kinetic energy.

In the case of someone

sliding into base,

it takes kinetic energy

and turns it into heat.

The same way when you rub

your hands together real fast,

you can feel the heat.

You can calculate the energy

lost due to friction

in problems by using physics

that we've already learned.

How much work does friction do

if an 85 kilogram base runner

travels at an initial velocity

of 8 meters per second

and slides into second base

and then stops?

So, let's write down our knowns

and our unknowns.

Mass is equal to 85 kilograms.

Our initial velocity

is 8 meters per second.

Our final velocity

is 0 meters per second.

And we're solving for

the work done by friction.

And here's the equation

that we need to know.

Work is equal to the final

kinetic energy minus

the initial kinetic energy.

That means that work is

equal to 1/2 the mass times

the final velocity squared,

minus 1/2 mass times

the initial velocity squared.

We then plug in the values

we know and get work

due to friction equal to

1/2 times 85 kilograms times

0 meters per second squared

minus 1/2 times 85 kilograms

times 8 meters

per second squared.

Now, the first part of

the equation will be

equal to 0,

since 0 times anything is 0.

And that leaves us with

1/2 times 85 kilograms

times 8 meters

per second squared.

When we multiply that out,

we get the work done

by friction to be

negative 2,720 joules.

So friction takes energy

away from the kinetic energy

of the base runner, right?

Why are we getting

a negative answer?

Work is a scalar quantity.

How can it be negative?

Well, that negative sign

tells us that energy was taken

away from our base runner.

A positive number for work

would tell us that energy

was added to the base runner.

Does that make sense?

When you think of

the total work done,

that is the change in energy.

It's also the work

to overcome forces that

are hard to measure,

like friction.

That's what the

Work-Energy Theorem

allows us to solve.

The Work-Energy Theorem

is at the heart of

understanding physics.

And once you understand it,

you have a much better sense

of how the world works.

That's it for this segment

of "Physics in Motion",

and we'll see you next time.

>> For more practice problems,

lab activities,

and note-taking guides,

check out the

"Physics in Motion" toolkit.