Archimedes
Levers have existed since prehistoric times. There is no record of who invented levers. The earliest mention of levers of which there is a record was by Archimedes, but they were in use long before his time.
Difficult, levers are essential in life. Mostly everything we use uses levers such as our body, airplanes, lifting things, scissiors, nutcrackers etc. Some things require levers and they would not be possible without them. Hope that helped :)
they are second class levers
Lever belongs to the category of simple machines. They are three types of levers 1. First class levers 2. Second class levers 3. Third class levers In the first class levers fulcrum is in between applied force and load. common examples are Crowbar , Pair of scissors , SeeSaw , Skull and neck in our body .
Most people use levers to turn on and off a giant machine. But I only know that scientists use it. =)
Levers will wear and tear after use and money will have to be spent to repair or replace them.
Archimedes
Teeter totter
Levers have existed since prehistoric times. There is no record of who invented levers. The earliest mention of levers of which there is a record was by Archimedes, but they were in use long before his time.
Difficult, levers are essential in life. Mostly everything we use uses levers such as our body, airplanes, lifting things, scissiors, nutcrackers etc. Some things require levers and they would not be possible without them. Hope that helped :)
Mechanical advantage is not the only reason to use levers.
Scales and kitchen use.
Shovel,broom and spoon
Some careers that use the Spanish language include customer service and airline attendants.
because it makes things easier to lift..... that's why you use it i think.........
A lever is a simple machine that makes work easier for use; it involves moving a load around a pivot using a force. Many of our basic tools use levers, including scissors (2 class 1 levers), pliers (2 class 1 levers), hammer claws (a single class 2 lever), nut crackers (2 class 2 levers), and tongs (2 class 3 levers).