Kinesiology 2241A/B Lecture 15: 2241 Lecture 15 October 19
12 Jan 2016
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Lab 2 question 2 a teeter totter, no numbers, one line answer, mass of each object is equal to its size, on right side, apply a force and force arms that are assigned to each object. Use letter variables for the forces and the force arms, no numbers involved. It is in a static position, completely balanced, torque = 0. I is rotational inertia a body"s resistance to change angular motion. I = mk2 mass x distance^2 that the mass is away from the axis of rotation. On the move and hard to stop. When you start a kicking/throwing movement start by trying to accelerate the more massive segment. In order to kick a ball you have to start at the hips. The star is the axis, such as the shoulder when throwing a ball. B and c lag behind because they are torque less massive. The massive segments run out of motion and start to decelerate.
