"Which of the following is the first-class lever? A. A wheelbarrowB. A nutcrackerC. a swinging baseball bat​"

"Answer:

C. a swinging baseball bat

Explanation:

Other examples of first class levers are pliers, scissors, a crow bar, a claw hammer, a see-saw and a weighing balance. In summary, in a first class lever the effort (force) moves over a large distance to move the load a smaller distance, and the fulcrum is between the effort (force) and the load."