Final answer:
The three basic components of a lever are the effort arm, the resistance arm, and the fulcrum. It is the part that moves the load or resistance. The fulcrum: This is the fixed point around which the lever rotates. For example, in a wheelbarrow, the handles act as the effort arm, the wheel acts as the fulcrum.
Step-by-step explanation:
A lever is a simple machine consisting of a rigid bar that rotates around a fixed point called the fulcrum. The three basic components of a lever are: The effort arm: This is the part of the lever on the opposite side of the fulcrum from where the input force is applied. It is the part where the effort force is exerted.
The resistance arm: This is the part of the lever on the same side of the fulcrum as the load or resistance. It is the part that moves the load or resistance. The fulcrum: This is the fixed point around which the lever rotates. For example, in a wheelbarrow, the handles act as the effort arm, the wheel acts as the fulcrum, and the load in the wheelbarrow acts as the resistance arm.