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.