the three days at school

during the first three days at school we spent the first day at school doing english we played games and did some work like doing each others compo.the second day is maths, we did some challenging questions with our teamates and finally the third day we spent time doing science we did many experiments and had a great class party bash at the end of school.we had so uch fun during the three days at school during the holidays.

I took this picture from the internet.The chopsticks is a lever.The point where two chopsticks crossed is the pivot of the lever.In ancient times, our ancestors liked to steam or boil food. It was difficult for them to use spoons to dip vegetables in the soup.So they invented the chopsticks as it is easier for them to use it to dip vegetables.We hold the chopsticks with our thumb, index finger, middle finger and third finger. One stick is against your third finger and the other leans on your middle finger.When we pick the food, we use our index finger and middle finger to control the chopsticks and nip food.It will be hard to keep using spoon if they did not invent it.

Homework1

A foot pump is a lever.The foot pump allows us to use our legs to pump vehicle tires,inflatable toys , athletic balls and more!Using our leg to pump a ball is easier than using our hands.The foot pump has an air pressure guage which lets us see the air pressure of the object that you are pumping.The further the effort from the fulcrum the lesser the effort is needed to push the pedal down.The foot pump has a base to help support it.

Homework 1

Broom - lever

The fulcrum is in the middle and the load is litter. The effort is the force applied at the lever.
A lever can help us to do work with less effort or in less time.

For a lever to move a load in less time, the distance moved by the fort should be smaller than the distance moved by the load. More effort is also needed. To make all these happen, we could use a longer lever.

Example: a longer broom can clear the same litter in less time as the longer broom makes the load travel a greater distance.

-The picture is uploaded from the internet.

Simple but verrrrrrrryyy useful machine!!!!!!!!!!!!

Speaking of simple machines this is what I've found. (I'm sorry i cant take a picture of it and i do not know how to place it). I have found this simple machine which uses the principle of the wheel and axle.A wheel and axle is a simple machine made up of two circular objects of different sizes. The wheel is the larger object. It turns about a smaller object called an axle. Because the wheel is larger than the axle, it always moves through a greater distance than the axle. A force applied to the wheel is multiplied when it is transferred to the axle, which travels a shorter distance than the wheel . A wheel is a lever that can turn 360 degrees and can have an effort or resistance applied anywhere on that surface. The effort or resistance force can be applied either to the outer wheel or the inner wheel (axle). whoops i almost forgot to mention about the simple machine I found in my house . It s a door knob .A door knob uses a larger "knob" to turn a smaller rod. You trade distance for force. In a bicycle you trade force for distance. By turning the bicycle axle with a pedal you get more distance (or speed) as the larger wheel turns.
Nirmal Kumar

Homework 1

inclined plane

i am not quite sure , but i suppose so ... the bathroom ,when u bathe ,water goes down the drain the floor is always slanted to let the water go down the drain ( is it counted?)it lets the water flow properly instead of letting it stay "flooding". i just thought of it .

lever

the HOLE PUNCHER !the lever arm is the effort , the fulcrum is in the middle and the load is the paper . the bottom acts as a base to help to push it down and collect the paper . a bigger hole puncher is easier to use as less effort is needed although it is bulky .when you press the "arm" of it , it cuts through the paper and thats it !

gears
the bicycle .the wheels have gears and a chain is connected .the pedal also affects the distance travelled within a pedal because the bigger the wheel , the longer the distance ,it is involved in wheel and axle .

HOMEWORK 1

It is the curtain. It is consist of 2 fixed pully which is place one on top and one at the bottom.It will have a string attached to the two pulley.
When one of the string is pulled down, the curtain will move. It helps the person to move over a short distance and use lesser effort to move the curtain(load).
Without it, we have to walk a long way...
:D

Homework 1

speaking of my house, i knew nearly everything in every litttle corner of my house... let's start from my kitchen! oh ya, there is the clothes hanger it consist of pulley but not sure (fixed pulley,movable puley or the pully system) i think is fixed pulley?ok! it has the duty of hanging my clothes, whithout it that will be my end of life! i think...=) now walking towards my 100 more years old fans(at least should have 10 years old!!) i think the blade is the axle? and the hub is the wheel.is this the end of my house? of course not! the next place we are visiting is my bedroom! there is the curtain which is also made up of pulley!i use it everyday when the intensity of light increase everyday! it is the end of the 1 day tour around my house hehe=) byes please pardon me if i write any wrong facts or offended someone =)

Homework1

The simple machine I've found in my house is the SCISSORS. It makes use of the simple machine principle called ''lever''.It is used to cut things, from paper to meat. The fulcrum is found in the middle, and the effort is placed on the handle of the scissors. The load is then placed in between the blades. When an effort is applied to the scissors with a load on it, the sharp blades of the scissors will ''squeeze'' the load, causing the load to split. The amount used to cut a load varies according to the SIZE of the load , STRENGTH of it and SHARPNESS of the blade. Of course, if you try to take a pair of scissors to cut a COCONUT, then you should not expect the coconut to even have a single scratch on it. Also, if you use a 10 year old saftey scissors, then you should not even expect to cut CARDBOARD!!! The main difference between a pair of saftey siccors and a pair of metal scissors is that the saftey scissors are generally more blunt, and could not cut most hard materials like cardboard, whereas the metal scissors could cut most things, like hard cardboard, which the saftey scissors could not.

HOMEWORK1

The simple machine I found was the FAN. You know,the one that helps us to save electricity and money by using it instead of the air-conditioner! By examining the blades and mechanism that makes them spin, i found out that the blades of the fan are actually connected to a central "hub"
where a simple machine which resembles a wheel and axle spins the "hub". Causing the blades to spin!

The main difference between a traditional wheel and axle and the Fan's wheel and axle is the facet that the traditional one uses good old fashioned muscle power while the Fan's one is spun by a electrical motor instead of some burly guy's arm!

( Could not paste picture as a virus wiped my hard drive blanker than a magnetised disc. I had reinstall everything! )