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 .