Question

Which example represents a class 2 lever?



a car door being opened and shut
a car door being opened and shut

a screwdriver opening a paint can
a screwdriver opening a paint can

tweezers plucking hairs
tweezers plucking hairs

salad tongs picking up salad

Answer 1

A class 2 lever is characterized by the load being positioned between the effort (force applied) and the fulcrum (pivot point). In the examples provided:

- **A car door being opened and shut** is a class 1 lever (fulcrum is at the hinge).
- **A screwdriver opening a paint can** functions as a class 1 lever (fulcrum at the edge of the lid).
- **Tweezers plucking hairs** behave like a class 1 lever (fulcrum at the joint).
- **Salad tongs picking up salad** can function as a class 2 lever if contemplating the tongs with the salad being the load and the ends where the user's fingers apply effort.

Hence, the most fitting example of a class 2 lever from the options provided would be **salad tongs picking up salad**.