Question

Which of the following set ups represent a second class lever?
A)

B)

C)

D)

Answer 1

Hint: In second class lever, the load is kept between the effort and fulcrum. Find the combination of load, effort and fulcrum in the options as given in question.

Complete step by step solution:
A lever is a straight rigid bar that rotates about a fixed point. A lever is actually a simple machine which consists of a rigid bar that rotates around a point called fulcrum.
All the levers have three important things-
Load- It is the object that we want to move .
Effort – It is the force applied to move the load.
Fulcrum- It is the fixed point around which the lever moves.

There are three types of lever- based on their relative position of load, effort and fulcrum. We will see how a second class lever looks and works .
In the second class lever, the load is put in between fulcrum and effort. This is how a second class lever looks-

Some examples of second class levers- Nutcracker, Scissors , Bottle Opener etc . The load has to be between the effort and the fulcrum . From the given options where each symbol represents:
$
  F = fulcrum \\
  E = effort \\
  L = load \\
 $
The diagram in the second option satisfies the condition of second class lever.

Hence , the correct option is B.

Note: The less the distance between the load and the fulcrum, lesser will be the force required. This means that if the load is kept in proximity with fulcrum than the effort , less force will be required in moving the load and vice-versa.