Question

The diagram above shows a wheel barrow. Mark the position of the fulcrum F and draw arrows to show the directions of load L and effort E. What class of lever is the wheel barrow? Give one more example of the same class of lever.

Answer 1

As a very first step, one could read the question well and hence note down the important points. So, we basically have a figure on which certain markings have to be done. Recall the known facts about levers and hence find all these and do the markings and then identify the class to which this belongs and also give another example.

Complete step by step answer:
In the question given above, we are given a wheelbarrow in the figure. We are asked to mark the position of the fulcrum and draw arrows in the direction of load L and effort E. We are also supposed to find the class of lever to which the wheel barrow belongs. We should also give one more example to this same class of lever.
We could define a lever as a simple machine that consists of a beam or may be a rigid rod that is pivoted at a fixed hinge or may be a fulcrum. So basically a lever could be defined as a rigid body capable of rotating on a point on itself.
The given wheelbarrow falls to the class II of levers. And another example to this class is a nutcracker.

The figure above has all of the fulcrum, load and effort marked on it.

Note: The basis of classification of levers is locations of fulcrum, load and effort. And based on this the lever is divided into three types. Lever basically provides leverage that is, it functions by amplifying the input force and thereby providing greater output force. The mechanical advantage of the lever is given by the ratio of output force to the input force.