The systems of the human body include the digestive, nervous, and other major structures that work interdependently to ensure proper functioning. These structures are categorized as cells, tissues, organs, and organ systems. The arms and legs that build off of the core are needed for movement and doing work.Ī human body, like a machine, is made of numerous structures that work together to perform a specific function. The center part of the body is often referred to as the core and houses most major organ systems. The top half of the body, the head, houses the control center organ of the body called the brain. The human body is made up of two-hundred and six bones working in concert with your three-hundred and twenty pairs of muscles. Did you know that you shed nearly ten pounds of skin cells every year? In your lifetime, your heart will beat just about three billion (with a B) times. The mouth produces nearly one liter of saliva every day. The source of this force is object B, and this normal force is labeled accordingly.Our bodies are super cool! There are so many things going on in it that we still don't fully understand to this day. Object A has one interface and hence experiences a normal force, directed away from the interface. The weight of the object acts as a force pointing vertically downward, and the presence of the cord indicates a force of tension pointing away from the object. We now include any force that acts on the body. In part (c), we show all forces in terms of their x– and y-components, in keeping with step 3. In part (b), we show a free-body diagram for this situation, as described by steps 1 and 2 of the problem-solving strategy. In Figure(a), a sled is pulled by force P at an angle of 30^\circ. Let’s apply the problem-solving strategy in drawing a free-body diagram for a sled. You can label it in a different color to indicate that it is separate from the free-body diagram. Note: If there is acceleration, we do not directly include it in the free-body diagram however, it may help to indicate acceleration outside the free-body diagram.
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