Levers

Question 1

First Class Lever

Answer 1

A force is applied on one side and a resistance is applied on the other side.

*A playground seesaw with someone on each

Question 2

Second Class Lever

Answer 2

The fulcrum is toward the end of one side (either side). Both the applied force and the resistance are on the same side with the resistance closer to the fulcrum (pivot point)

*A calf raise. The ball of the foot is the fulcrum, the weight of the body is the resistance, and the calf muscle applies the force.

Question 3

Third Class Lever

Answer 3

the fulcrum is toward the end of one side (either side). Both the applied force and the resistance are on the same side with the applied force closer to the fulcrum (pivot point).

• Using a shovel to scoop up some gravel. The top have is the fulcrum as the other hand applies the force to pick up the gravel (resistance)
• A dumbbell biceps curl is another example