CHAPTER 11 : Equilibrium and Elasticity
CHEE ZI QING A20SC0043
The Conditions for Equilibrium
Solving Statics Problems
Stability and Balance
Elasticity; Stress and strain
Fracture
Trusses and Bridges
Arches and Domes
Torque,τ net=o
Fnet=0
Force negative means opposite direction
stable equilibrium = return to a desired position or trajectory following a disturbance
at tipped= unstable
Hooke's law, F = kx
Young Modulus(N/m^2) 
Shear Modulus 
Bulk Modulus 
a things will fracture if stress too big
The steeper the arch, the less the horizontal component of the force needed
