Class Two Lever Show A lever could be something as simple as a wooden board with a ridge that freely rotates or moves on a pivot. The most common and popular lever can be found in many playgrounds: a see-saw or teeter-totter. They are found everywhere and it is one of the most useful simple machines. There are three classes of levers. The image below is an example of a Class Two Lever, sometimes called a Second Class Lever. Examples of Class Two Lever: All classes of levers have four basic parts:
 The Class of Lever is determined by the location of the load, fulcrum, and force. In a Class Two Lever, the Load is between the Force and the Fulcrum. The closer the Load is to the Fulcrum, the easier the load is to lift. Examples include wheelbarrows, staplers, bottle openers, nut cracker, and nail clippers. A great example of a Class Two Lever is a wheelbarrow. The dirt in a wheelbarrow is the Load, the Fulcrum is the wheel, and the Force is at the end of the handles where a person lifts it. When the dirt is spread out evenly, the wheelbarrow is balanced and not difficult to push and move from place to place. However, if all of the dirt is moved to the front, the Load is then closer to the Fulcrum, which will make it easier to lift. If the dirt was moved closer to the force or back of the wheelbarrow, it would become more difficult to lift. Some simple machines are made up of two Class Two Levers such as nutcrackers, staplers, and nail clippers. In the nutcracker below, both handles come together, the force, to break open the walnut, the load. The fulcrum is located at the end of the nutcracker were the handles are joined together. Notice how the parts are located similar to the image to the right. Planes and Levers Reading Comprehension Where are second class levers found?Second class lever – the load is in the middle between the fulcrum and the effort. This type of lever is found in the ankle area. When standing on tiptoe, the ball of the foot acts as the fulcrum, the weight of the body acts as the load and the effort comes from the contraction of the gastrocnemius muscle.
What is a class 2 lever examples?Give some examples of second class levers.
Wheelbarrow, staplers, doors or gates, bottle openers, nutcracker, nail clippers, etc.
What is a 2 class lever?In a second class lever, the load is located between the effort and the fulcrum. In a second class lever, the load is located between the effort and the fulcrum. When the fulcrum is closer to the load, then less effort is needed to move the load (©2020 Let's Talk Science).
What is an example of a class 2 lever in the human body?Standing on tip toes is a Class 2 lever. The pivot is at your toe joints and your foot acts as a lever arm. Your calf muscles and achilles tendon provide the effort when the calf muscle contracts. The load is your body weight and is lifted by the effort (muscle contraction).
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Where is a class 2 lever?
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