Question #006b4

1 Answer
Feb 21, 2017

Answer:

A catapult is an example of a third class lever.

Explanation:

The different classes of lever are based on the relative locations of the fulcrum, the load and the effort.

A see-saw is the classic example of a first class lever, in which the fulcrum is between the load and the effort. This is also seen in a pair of scissors.

http://www.enchantedlearning.com/physics/machines/Levers.shtml

A second class lever has the fulcrum at one end and the effort is applied at the other end. The load is in the middle. Think of a wheelbarrow. This lever is generally designed to allow very heavy loads to be moved with small efforts.

http://www.enchantedlearning.com/physics/machines/Levers.shtml

The third class lever has the fulcrum at one end, and the load at the other end. The effort is applied between these two.

http://www.enchantedlearning.com/physics/machines/Levers.shtml

A third class lever is often designed to use an effort to create high speed in the movement of the load. A fishing rod is another example of this type of lever.