EXSS1018 Lecture 12: Week 12 Notes
4 Sep 2018
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Centre of mass: point around which the mass of a body is equally distributed (can be outside the object) Centre of gravity: balance pint of an object weight equally distributed. Gravity acts through the centre of mass. Can be moved outside the body if sufficient flexion is present. Body is balanced when the com falls within the base of support. Shortest distance from the line of gravity to the pivot point. Increasing base of support can make a body more stable. Body will fall if torque pushing the body over is greater than a torque opposing this movement. Lecture 2 moment of inertia and angular momentum. Resistance of an object or body to changes in its state of rotary motion is the ease or difficulty in accelerating or decelerating that object. Determined by mass and how far hat mass is distributed from the axis of rotation. Moment of inertia = mass x radius2 (i = mr2)
