Answer Happy

This lab exercise will provide a more in-depth look at center of gravity (CG), stability, and equilibrium of rigid objects as well as the human body. Each exercise demonstrates where the CG is located, as well as the relationship between CG and base of support in terms of an object's stability. Additionally, you will experience how to move' your CG in order to maintain stability in several challenging balancing situations. Center of mass (COM): a point at which the body's mass is evenly distributed and is assumed to be concentrated. Center of gravity (COG); the point through which the force of gravity acts on an object or system. Center of mass and center of gravity have the same position (alternative interpretation). Base of Support (BOS): The area beneath an object or person that includes every point of contact that the object or person makes with the supporting surface. Learning Goals: After this lab, you should be able to: 1. Describe CG of a rigid object and determine where it is located 2. Describe the relationship between CG of the human body and stability/equilibrium Exercise 1: Determine the CG of a rigid object For this exercise, you will be asked to find the CG of a rigid object. Recall that CG is the balance point of an object in all directions (medial-lateral, anterior-posterior, upwards- downwards), and when an object is in static equilibrium, it is considered stable. Data Find 5 rigid objects at your home that differ in size and shape. (Do NOT select very heavy or large objects). In the table below, list the object, describe how you will determine the CG, and once you've determined the CG, indicate where it is located by producing a rough drawing of the object and notating the CG on the drawing. (1 pts for each activity)
Object How did you determine CG Draw a picture of the object noting CG location Exercise 2: CG of the Body Recall that the CG of the body is fluid- it is the balance point, but as mass moves, the CG must also move to maintain stability. If the vertical projection of the CG falls outside of the base of support (BOS), the individual is no longer in static equilibrium and will most likely be required to take a step (or other external maneuver) in order to place the vertical projection of the CG back within the base of support. For this exercise, you will perform several movements that will challenge your balancing abilities. The goal in each position is to maintain equilibrium as long as possible, whether through changing the overall shape of your body or increasing your BOS. Describe what you feel as your vertical projection CG migrates closer to the edges of your BOS, as it transfers outside of your BOS, and how you adjusted to maintain stability. (Each body position is 2 pts) Position Where did you feel your CG shift How did you maintain stability Yoga Tree Po *Place arms above head, and begin to way from side to side Sit in a chair Place the chair for enough behind you that you may fall ato safely) Standing upright lean as far as you can in each direction front, back, left, right) Stand on your tee ballerina) and ask someone else attempt to push you over Get in a football Fready" stance ( point stance) and ask someone else attempt e pash you over
QUESTIONS 1. Among the above body positions, which one has less stability? Explain why? (3 pts) 2. Which person has a better stability in gait? Explain why? (3 pts) 3. Describe two things a person can do to increase their stability. (4 pts)