Question

Copy the diagram of the forearm given below, indicate the positions of Load, Effort and Fulcrum.

Answer 1

1. Mark the Fulcrum (F) at the elbow joint.
2. Mark the Effort (E) at the point where the biceps muscle is attached to the forearm, just below the elbow.
3. Mark the Load (L) at the hand, where the weight is being held.

Thus, the arrangement is:

Fulcrum - Effort - Load

Therefore, the human forearm acts as a third-class lever.