Question

advantages of each of the three types of lever? ​

Answer 1

class1

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.

class2

A Class 2 lever has the load between the effort and the fulcrum. In this type of lever, the movement of the load is in the same direction as that of the effort. Note that the length of the effort arm goes all the way to the fulcrum and is always greater than the length of the load arm in a class 2 lever.

class3

Class 3 lever has the effort between the load and the fulcrum. Both the effort and load are in the same direction. Note that the length of the load arm goes all the way to the fulcrum and is always greater than the length of the effort arm in a Class 3 lever. Also, load in a Class 3 lever moves in the same direction as the effort.

Because of the location of the effort with respect to the fulcrum, often a bearing or other device is needed to hold the beam in place as it pivots. Otherwise, the effort will pull the arm off the fulcrum

Answer 2

Answer:

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Explanation:

First-class levers have a considerable practical advantage over the other types of levers. They convert a downward moving force into a lifting force. This means that you can always augment your ability to lift a load across a teeter-totter style lever simply by using the force of gravity.

Second class levers always provide a mechanical advantage. The effort is always less than the load, and always moves farther than the load. Actually, if you look at the lug wrench in detail, the point that doesn't move (the fulcrum) is in between different parts of the load- the different sides of the nut.

The mechanical advantage of a 3rd class lever is always less than 1. For this class of levers, the input effort is higher than the output load, which is different from second-class levers and some first-class levers. However, the distance moved by the load is greater than the distance moved by the effort.