Simple Machine

1.Spoons and Fork.They belong to the lever category of simple machines.The fulcrum is in the middle while load and effort are infront.Fulcrum is something that the object lean on , in this case,our hand.Our index finger and thumb hold the spoon/fork which will be the effort while the load is ,of course,our food.

2.I don't know what exactly it is called,but i draw it,looks quite blur but never mind.

I have also draw out where the wheel and axle are.When we turn the axle which is also the handle,the wheel will turn and garden hose will extend by rolling out more and more .Since the axle (where effort is apply)travel a longer distance than wheel,it reduce effort .

3.Chopstick,i know Wei Jie had done them but it is the first i idea i have come up and i have written a lot notes on them,so i decided to put it in anyway.

Chopsticks itself is not really a lever,but when we use it,it can be consider as a lever.(had check with tuition teacher)When we use the chopsticks, the fulcrum is in the middle while effort and load is infront.This type of lever involve a larger effort to move them load ,the effort and load also move in the same direction.Take a pair of chopsticks and try this to see if it is really a lever.The middle part of chopsticks leans against in between your thumb and index finger which will be fulcrum while effort is apply by your fingers.The load,of course,is your food!

So this is a simple machine that is not really a simple machine.It is only a simple machine when we use it,and not a simple machine when it is not in use.

homework1 (science)

The fixed pulley
Some curtains use a fixed pulley to open and close the curtain. It is of great help as it changes the direction of a force, making it easier to open and close a curtain, and also the distance moved by the effort is same as the distance moved by the load. So whenever you want a curtain open ,just pull the string that is attached to it.

my door knob its has a wheel and axle inside like there are two axle and one wheel and the axle is coverd by the knob so when u turn the knob or push it down the wheel in the middle will mover henceforth opening the door.(iam not sure if my explanation is detailed...^-^)

another wheel and axle is the clock on the wall the axle is smaller than the wheel in diameter.The axle is in the clock , in the concealed part.

a lever is a crowbar. I dont know why is it in my house but its just in there.when we use it to open crates that are tightly sealed during that moment the crowbard is counted a lever. by the lucky the minituare schnauzer .

homework 1

1. The switch, is an everyday tool that we use. And, the simple machine that is used is the lever. The fulcrum is in the middle of the switch while the effort is on the side of the switch while the load is...to turn the switch on!

The lever helps us by reducing the amount of effort needed for the job or or it can move the load a longer distance depending on where the fulcrum is.

2. The door stopper is a very effective simple machine that is used to prevent the doors from moving. It is actually an inclined plane that is wedged right between the floor and the door which in turn, will prevent the door from moving!

3. The can opener is a ingenious device that allows you to open up your cans with ease. It has gears inside which turns the blade inside when you turn the handle.

4. there is a type of ceiling fans that need you need to pull some string to change the speed which, uses pulleys!!When you pull the string, you also pull something inside the fan to change the speed!

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 .