PHY183-Lecture28

# PHY183-Lecture28 - March 6 2006 Physics for...

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Unformatted text preview: March 6, 2006 Physics for Scientists&Engineers 1 1 Physics for Scientists & Physics for Scientists & Engineers 1 Engineers 1 Spring Semester 2006 Lecture 28 March 6, 2006 Physics for Scientists&Engineers 1 2 From yesterday From yesterday Center of gravity = point at which we can imagine the gravitational force to act on the object An object can be at rest if its center of gravity is either supported from directly below or suspended from directly above The center of gravity of a system of n masses is defined as 1 1 2 2 1 1 2 ... 1 ... n n n i i i n rm r m r m R rm m m m M = + + + = = + + ! r r r r March 6, 2006 Physics for Scientists&Engineers 1 2 From yesterday From yesterday Center of gravity = point at which we can imagine the gravitational force to act on the object An object can be at rest if its center of gravity is either supported from directly below or suspended from directly above The center of gravity of a system of n masses is defined as 1 1 2 2 1 1 2 ... 1 ... n n n i i i n rm r m r m R rm m m m M = + + + = = + + ! r r r r r March 6, 2006 Physics for Scientists&Engineers 1 3 Calculating the Center of Gravity Calculating the Center of Gravity How do we calculate the center of gravity for an arbitrarily shaped object? We represent the object by small identical cubes Each cube has its own center of gravity and we can calculate the center of gravity of the system of cubes March 6, 2006 Physics for Scientists&Engineers 1 4 Density Distributions and Center of Gravity...
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PHY183-Lecture28 - March 6 2006 Physics for...

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