# Older blog entries for jwp9447 (starting at number 45)

Physics: The First Step of Robotics-1(Mechanical Energy)

Physics: The First Step of Robotics-1(Mechanical Energy)

As you know, physics is the most important thing we have to know to do robotics. So first, lets talk about ‘mechanical energy’.

Kinetic Energy:
This is a energy that occurs when a object moves.
It’s mathematical formula is E=1/2mv2. ‘M’ stands for mass, and ‘V’stands for velocity or speed. It mearsured in Joules or ‘J’, maded after the physicist “Joules”.

(Examples: A running man, trains, buses, cars, planes, rockets)

Potential Energy:
This energy occurs due to the height of an object. If I am in high above
Mt. Everest, that means I have potential energy. It’s mathematical formula is E=9.8mh. ‘M’ stands for mass, and ‘h’ stands for height. It mearsured in Joules or ‘J’, maded after the physicist “Joules”.

(Example: In above a building, tower, mountain, inside a flying plane)

Mechanical Energy:
This energy is measured in ‘kinetic energy+potential energy’ or
‘1/2mv2+9.8mh’. Mechanical energy is very useful in our lives. Let solve this question.
—A ball is about to fall down and collide with the ground. The ball fell down at the height of 100 meters. Calculate the velocity or speed of the ball when it collides with the ground.
A: First we don’t know the mass of the ball. So lets just skip that one.
When the ball fell at the height of a 100m, the kinetic energy is 0J because it didn’t move, and the potential energy is 9.8*100 so its 980J. So the mechanical energy at this point is 980J+0J so its 980J!

But when the ball fell, the potential energy gets smaller because the height is getting low. While since the ball is gaining speed, it gains more kinetic energy! So at any point of the route where the ball is falling, the mechanical energy is 980J!

When the ball collides with the earth, we already knowe that the mechanical energy is 980J. And since the height is 0 meters, the potential energy is oJ. So this means 1/2v2+9.8h=980, the potential energy is 0J, so
1/2v2=980.

Thank You!!!!!!

Syndicated 2009-10-05 12:03:06 from Mickey's Blog

Physics: The First Step of Robotics-1(Mechanical Energy)

As you know, physics is the most important thing we have to know to do robotics. So first, lets talk about 'mechanical energy'.

Kinetic Energy: This is a energy that occurs when a object moves. It's mathematical formula is E=1/2mv2. 'M' stands for mass, and 'V'stands for velocity or speed. It mearsured in Joules or 'J', maded after the physicist "Joules".

(Examples: A running man, trains, buses, cars, planes, rockets)

Potential Energy: This energy occurs due to the height of an object. If I am in high above Mt. Everest, that means I have potential energy. It's mathematical formula is E=9.8mh. 'M' stands for mass, and 'h' stands for height. It mearsured in Joules or 'J', maded after the physicist "Joules".

(Example: In above a building, tower, mountain, inside a flying plane)

Mechanical Energy: This energy is measured in 'kinetic energy+potential energy' or '1/2mv2+9.8mh'. Mechanical energy is very useful in our lives. Let solve this question. ---A ball is about to fall down and collide with the ground. The ball fell down at the height of 100 meters. Calculate the velocity or speed of the ball when it collides with the ground. A: First we don't know the mass of the ball. So lets just skip that one. When the ball fell at the height of a 100m, the kinetic energy is 0J because it didn't move, and the potential energy is 9.8*100 so its 980J. So the mechanical energy at this point is 980J+0J so its 980J!

But when the ball fell, the potential energy gets smaller because the height is getting low. While since the ball is gaining speed, it gains more kinetic energy! So at any point of the route where the ball is falling, the mechanical energy is 980J!

When the ball collides with the earth, we already knowe that the mechanical energy is 980J. And since the height is 0 meters, the potential energy is oJ. So this means 1/2v2+9.8h=980, the potential energy is 0J, so 1/2v2=980.

Thank You!!!!!!

1 Oct 2009 (updated 22 Oct 2009 at 13:49 UTC) »

Korea’s First Humanoid Robot Capable to Walk: Hubo!!!

Korea’s First Humanoid Robot Capable to Walk: Hubo!!!

Hey Guy? Hope you are interested in
humanoid robots. Hubo
can’t climb the stairs but its
movement of its fingers,
the physical intelligence
and physical force is great!
Lets watch some video!

Syndicated 2009-10-01 11:28:42 from Mickey's Blog

Computer Animation Graphic of KSMB-2

Computer Animation Graphic of KSMB-2

I am here to share my lastest projects. I am building a
missionbot named KSMB-2. KSMB-1 was a disaster! The one
of the rechargable battery exploded during a test! I was
because of the weight and pressure of the robot! I hope
KSMB-2 will be a great robot of my project!

The Lastest DC Motor

The Lastest Servo Motor

The Lastest LED Lighter

Wait for my KSMB-2! I sended 40\$ on my robot! I hope
it
will be cool!

Syndicated 2009-09-27 12:14:46 from Mickey's Blog

Golem’s group V.S MIT-Robotic Car!

Golem’s group V.S MIT-Robotic Car!

According to the science magazine ‘Popular Science’
MIT
researchers and the Golem’s Group researchers made a
robotic car. Capable of driving alone with a computer
while the driver rest! Well the method of doing this thing
is different.

The Golem’s Group:

It navigates it’s place my using the GPS satellite. It
uses light recieving sensor to know when to stop. The
problem is the price is much higher. It uses Lithum
Batterys. And it can’t work if the signals do not come.

MIT:

It navigates it’s place my using high laser cameras.
It
takes sensitive picture of nearby buildings signs, and
measure topography of moutains and hills! It uses light
recieving sensor to know when to stop, like the Golem’s
Group. It uses Hydrogen fuel Cell, so no pollution is done
to the Earth.
It can go anywhere!!!

See this picture for clear view!

Thank You!!!

Syndicated 2009-09-27 12:03:03 from Mickey's Blog

Computers: The First Generation of Robots!

Computers: The First Generation of Robots!

Computers which started over 100 years ago
was
because of war. But now computers are used for education,
networking, research projects, and everything. In his
article I will show you all parts of the computer!

The Screen

The screen is just a computer screen that show what
the
computer is doing inside there circuits. There are lots of
ways how the computer sreen shows its screen. The most
common is light shooters. Inside the screen there are lots
of small small small light shooters the shoot different
wavelength of light what we see are color. There are also
plasma and commpress LEDs.

The Ram

The ram, which is inside the computer is a memorizing chip.
When the computer is on, the data you should save in your
computer goes to the ram and be saved. But the ram loses
its data when the computer is off. So while the computer
is shutting down it sends its data to the hardrive. But
more rams means more smarter the computer is!

CPU

This is a place where most of the computers work
should be
sended. The CPU can calculate numbers, recognize color,
and send and receive data. CPU are measured in mHZ. More
mHZ means more data that the computer can process.

Mainboard

This circuit is where all electrical signals pass
through
the right direction. Ram, CPU, Hard Disk, the sreen is all
connected to the mainboard.

Hard Disk

This disk is contains with 4~6 metal recording disks.
All
of the programs, documents are all here in the hard disk.
70~100 GB are capable to be recorded!

Syndicated 2009-09-27 11:59:38 from Mickey's Blog

The U.S’s Powerful Military Robots

The U.S’s Powerful Military Robots-1

The U.S is the one of the most powerful country and
have a
military. The U.S invented this robot that is so powerful!
It has machine gun, electronical guns, radars, and even
explosives! Let’s watch a video!

Syndicated 2009-09-27 11:57:25 from Mickey's Blog

Robot on the Moon!

Robot on the Moon!

Soon, there will be a robot on the moon! nasa is
design a
control robotic car for astronauts on the moon!
Lets watch a video!

Syndicated 2009-09-27 11:51:36 from Mickey's Blog

Sprit and Opportunity: The U.S’s Robot on Mars!!

Sprit and Opportunity: The U.S’s Robot on Mars!!

the
twin
robots that landed on Mars in 2004 by the Delta-2 Rocket.
Sprit and Opportunity helped solve many problems of Mars!
Let’s watch some videos!

See how Sprit and Opportunity’s landing on
Mars!

Syndicated 2009-09-27 11:47:14 from Mickey's Blog

36 older entries...

Observer
Apprentice
Journeyer
Master