![]() ![]() ![]() Stand against a wall with your right side facing the wall, then put your right foot and cheek against the wall (you may need to move your right arm backwards).If you insist on picking up the object, you will fall flat on your face. Since the rules of this challenge do not allow you to move your feet and the wall is behind you, there is no way to shift your centre of gravity to maintain balance while trying to pick up the money. This would ensure that your centre of gravity is right above your feet to maintain stability. In order to keep your balance, you must move your feet forward or your bum backwards. When you bend forward, your centre of gravity shifts forward. When you stand straight against the wall, your centre of gravity is over your feet. Try to pick up the object on the floor without moving your feet or bending your knees.Stand with your back against the wall, feet together and heels against the wall.Tell the students they can keep the $10 bill if they succeed at this challenge (Hint: they cannot). Place an object on the floor about 50 cm from a wall.When you try to stand up with your back straight, you prevent the centre of gravity from moving to a position above your feet (your support base), as you would need to, to stand up. While sitting in a chair with your back against the chair and your feet on the floor, your centre of gravity is at your waist, supported by the chair. Keeping your feet flat and your back straight, stand up.Sit in a straight-back armless chair, keeping your back against the back of the chair and your feet flat on the floor.Unfortunately, your fingers are in the way. But to jump forward, you would have to use your toes. When you are holding onto your toes, jumping backwards is not a problem because you can use your heels to shift your weight. our feet) in the same direction to regain our balance. When we jump, we first shift our centre of gravity in the direction we want to jump, and then we move our support base (i.e. While bent over and holding on to your toes, you can jump backwards from one end of the room to the other, but you won’t be able to do a single jump forward. Jump forward in this position while holding your toes.While standing, bend over and hold your toes with your hands, keeping your knees slightly bent.After each demonstration, invite the students to try it for themselves.Invite a different volunteer to come to the front of the class to demonstrate each part.Why will an adult man not usually be able to succeed in this activity?.What happens to the centre of gravity when boys get older? When girls get older?.Where is an elementary student’s centre of gravity?.What part of your body is your base while you are kneeling?.What does your body have to be able to do in order to pick up your left foot? Why?.Why can’t you move your left foot off the floor?.What does your body have to be able to do in order to pick up the money? Why?.Why can’t you pick up the money without moving your feet or bending your knees?.What does your body have to be able to do in order to stand up? Why?.What part of your body is your base while you are sitting down?.How does your weight shift when you jump?.Why can you jump backward but not forward?.Why do people have different centres of gravity? Smartie or M&Ms (or a small non-food object) Straight-back chairs (student chairs work well) List the conditions required for an object to be stable. Identify ways in which balance affects our daily lives. Older girls will keep a lower centre of gravity, which is naturally located in the pelvis. Older boys tend to have bigger, heavier shoulders and a higher centre of gravity. As they grow, the centre of gravity shifts as their bodies change, depending on their sex. To keep your centre of gravity over your other foot, you lean your upper body or arms in the opposite direction to the leg.Īt the elementary school age, most students have a centre of gravity below their belly button. For example, when you stick a leg out in front of you, your centre of gravity shifts forward. When you change your body's shape, you shift the centre of gravity a bit. When you're standing straight, your centre of gravity is somewhere around your belly button. In the following series of activities, students reflect on these adjustments that make balancing their bodies possible. In routine day-to-day activities, your body maintains balance with little adjustments that are so automatic that you don't notice them. ![]() If there is a major change in this equilibrium, you fall over. ![]() You maintain your balance by keeping your centre of gravity over your support base (your feet). ![]()
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