Question

A lock and key is an example of lever of first order.

• A. True
• B. False

Answer 1

The correct option is A True

1. The insertion of the key inside the lock acts like the effort applied to the mechanism from one end.
2. The effort applied by the key turns or pushes the cylindrical pins in the lock which acts as a fulcrum at the center of the mechanism.
3. And finally, the load i.e., the lock gets unlocked due to the pushing of the pins.
4. This mechanism wherein we have the effort and the load at the ends and fulcrum in between, indicates that lock and key are the first-class levers.

Hence, the given statement is true.