What simple machine is a dumbell?
A dumbbell is considered a type of lever, specifically a class 1 lever. In this case, the fulcrum is the point where the dumbbell is held, the effort is the force applied by the person lifting the dumbbell, and the load is the weight of the dumbbell itself. By applying force at one end of the lever (lifting the dumbbell), the load (weight) at the other end can be moved, making it easier to perform exercises and build strength.