Physics Unit 5: Elastic, stress, strain
Hooke's Law
F=-kx & force needed to extend/compress a spring y some distance scales linearly/directly w/ respect to the distance
Pascal (unit)
SI unit of pressure (n/m²)
restoring force
a force that acts to bring an object back to equilibrium
Point particle
an idealization of particles
Inelastic body
is one that does not return to its original shape after a deformation
Rigid
not flexible, stiff
Bulk's Modulus
ratio of the change in pressure to the fractional volume compression; p=B(deltaV/V)
Stress
refers to the cause of deformation (produces a strain)
Mass distribution
special distribution of mass within a solid body
spring constant
a proportionality constant K (n/m)
Modulus of Elasticity
constant of proportionality; showing the relationship between stress and strain
Strain
deformation of materials in response to stress
Elastic body
is one that returns to its original shape after a deformation
shearing stress
stress that tends to cause different parts of an object to slide past each other across a plane
equilibrium length
the length of the spring when it is neither stretched nor compressed
Young modulus
the modulus for tensile & compressive stresses
yield strength
the stress at which the specimen becomes permanently deformed
ultimate strength
the stress at which the specimen ruptures
Tensile stress
two forces acting equal & opposite of one another ("stretching")
compressive stress
two forces acting towards each other ("smushing")