materials Flashcards
1
Q
what is the equation for density?
MATERIALS
A
ρ = m / v
where:
• ρ = density
• m = mass
• v = volume
2
Q
what is the equation for hooke’s law?
MATERIALS
A
F = kx
where:
• k = spring constant / stiffness
• x = extension
3
Q
what is the equation for young’s modulus?
MATERIALS
A
E = σ / ε
or
E = FL / Ax
where:
• E = young’s modulus
• σ = stress
• ε = strain
• F = force
• L = length
• A = cross-sectional area
• x = extension
4
Q
what is the equation for stress, σ?
MATERIALS
A
σ = F / A
5
Q
what is the equation for strain, ε?
MATERIALS
A
ε = x / L
6
Q
what is the equation for elastic potential energy?
A
E = 0.5kx^2
