Lecture13

# Lecture13 - Chapter 12 Equilibrium and elasticity PHYS 2101...

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Chapter 12 Equilibrium and elasticity 1 PHYS 2101, P.M.Shikhaliev LSU, Fall 2010

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12.2. Equilibrium 2 PHYS 2101, P.M.Shikhaliev LSU, Fall 2010 Equilibrium: P = const . linear momentum of center of mass (COM) is constant L = const . angular momentum about any point is constant Static equilibrium: P = 0 linear momentum of COM is zero L = 0 angular momentum about any point is zero
12.3. Static equilibrium 3 PHYS 2101, P.M.Shikhaliev LSU, Fall 2010 net force applied to the body should be zero net torque applied to the body should be zero

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12.3. Static equilibrium 4 PHYS 2101, P.M.Shikhaliev LSU, Fall 2010 1 2 3 4 In which cases static equilibrium is possible by changing magnitude of forces ? (do not make them zero)
12.4. The Center of Gravity 5 PHYS 2101, P.M.Shikhaliev LSU, Fall 2010 If g is same for all parts of the body then its center of gravity (COG) is same as its center of mass (COM) A single point exist in the body where sum of all gravitational forces of its parts act. This point is called center of gravity of the body.

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12.5. Sample problems
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Lecture13 - Chapter 12 Equilibrium and elasticity PHYS 2101...

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