lecture16[1]

# lecture16[1] - Statics Examples(Serway 12.1-12.3 Practice...

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1 Physics 1D03 Statics (Serway 12.1-12.3) • Examples Practice Problems: Chapter 12, problems1, 21, 23, 24, 53 Physics 1D03 - Lecture 27 2 Equilibrium of a Rigid Body 0 = Σ F 1) a = 0 (no translational acceleration), so (no net force) 0 = Σ τ 2) α = 0 (no angular acceleration), so (no net torque) Net external forces and net external torque must be zero for a body in equilibrium.

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Physics 1D03 Example: w 2 φ = 30 ° A B C 5 / 6 L 1 / 6 L Steps: 1) Free-body diagram for the beam. The forces will be the weights w 1 and w 2 , and the forces from the supports at A and C . 2) Net force = 0 (2 equations), net torque =0 (1 equation). 3) Solve for up to 3 unknowns. uniform beam AC: weight w 1 = 100 N length L = 3.00 m hinge at A, cable from B to C w 2 = 200 N Find: tension in BC , force at A . Physics 1D03 Note the force P from the wall. The hinge at A prevents translational motion in any direction, so it may exert a force P in any direction. The unknowns are: tension
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## This note was uploaded on 12/14/2010 for the course PHYS 1D03 taught by Professor N.l.mckay during the Spring '10 term at McMaster University.

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lecture16[1] - Statics Examples(Serway 12.1-12.3 Practice...

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