In levers of the third order, the *
load is between the fulcrum and the effort.
fulcrum is between the load and the effort.
effort is between the load and the fulcrum.
Answers
A third order lever is one which has the effort between the fulcrum and the load. Such levers do not have good mechanical advantage. In fact they have mechanical disadvantage. The effort is closer to the fulcrum than the load. There are three classes of levers, first order, second order and third order. They differ in the position of the fulcrum, load and effort.The masses are applying a downward force on the lever with their weight – which is a force. So the simple idea of balancing weights on a pivot reveals how forces act on a lever. A first-class lever is a lever in which the fulcrum is located between the input effort and the output load. A Class 1 lever has the fulcrum placed between the effort and load. The movement of the load is in the opposite direction of the movement of the effort. This is the most common lever configuration. The effort in a class 1 lever is in one direction, and the load moves in the opposite direction. The nut (load) is near the fulcrum, making it easy to crack by pushing on it from both sides, using the handles (effort). A class 3 lever has the effort between the fulcrum and the load. Because the load and effort are on the same side, they move in the same direction.This is especially key at the elbow. The biceps attach between the fulcrum (the elbow joint) and the load, meaning a biceps curl uses a third class lever. The triceps attach behind the fulcrum, meaning that a triceps extension uses a first class lever.Oars have a flat blade at one end. ... The oar is a second class lever with the water as the fulcrum, the oarlock as the load, and the rower as the force, force being applied to the oarlock by exertion of pressure against the water. An oar is an unusual lever since the mechanical advantage is less than one.