Question

A lever in which, the effort arm is always longer than the load arm is

• A. First-order lever
• B. Second-order lever
• C. Third-order lever
• D. None of these.

Answer 1

The correct option is B

Second-order lever

The explanation for the correct option:

Option(B): Second order lever

1. Second-order lever: The load is situated between the fulcrum and the effort.
2. Load arm is always less than the effort arm. Thus, always less effort is required to move heavy objects.
3. Mechanical advantage: The ratio of effort arm to load arm.
4. If the mechanical advantage is less than$1,$ then we need more effort.
5. Thus, the mechanical advantage is always greater than $1.$

The explanation for the incorrect option:

Option(A): First order lever

1. First-order lever: The fulcrum is situated between the load and the effort
2. Effort arm may be equal to or greater or less than the load arm. Thus mechanical advantage is $morethan1orequals1orlessthan1.$

Option(C): Third-order lever

1. Third-order lever: The effort is situated between the fulcrum and the load.
2. Effort arm is less than the load arm. Thus, the mechanical advantage is less than $1.$

Hence, the correct option: B)Second-order lever