There are three classes of levers, depending on the relative positions of the effort is applied, load, and fulcrum. 1  First-class levers have the fulcrum located between the load and the effort (LFE). If the two arms of the lever are of equal length, the effort must be equal to the load.
1 Ebro: From the 120 Foot level of the new cell tower, This is Ebro.
The Eiffel Tower is 320 metres (1050 feet) in height and was the tallest man made structure in the world for 41 years before being surpassed by the Chrysler Building in New York. The Eiffel Tower is made of iron and weighs around 10000 tonnes. Around 50 tonnes of paint are added to the Eiffel Tower every 7 years to protect it from rust. Despite its height, the Eiffel Tower was designed to be wind resistant, swaying only a few inches in the wind. It actually moves further when the iron on the sun facing side heats and expands, moving the top up to 7 inches (18 centimetres) away from the sun.