Young's Modulus Quiz

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Elasticity concept check

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MERCY MUTUNGA

Kenya

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Young's Modulus Quiz


Froggy Jumps Young's Modulus QuizVersion en ligne Elasticity concept check par MERCY MUTUNGA 1 What does Young's modulus (E) measure in a material? a The ratio of stress to strain b The total energy stored in deformation c The mass per unit volume of the material 2 Which units are used for Young's modulus in the SI system? a Newtons (N) b Pascals (Pa) or gigapascals (GPa) c Joules (J) 3 If a material's Young's modulus is high, it means the material is: a Very ductile b Has a high density c Stiff and resistant to deformation 4 Which quantity is directly proportional to stress in Hooke's law for small deformations? a Volume b Strain c Young's modulus 5 For a given material, how does increasing temperature generally affect Young's modulus? a It stays the same b It tends to decrease c It increases proportionally with temperature 6 Which physical concept is used to define E = stress/strain? a Hooke's law (in the elastic limit) b Conservation of energy c Bernoulli principle 7 Young's modulus is most meaningful in which region of a material's stress-strain curve? a Ultimate tensile strength region b Yield region c Elastic (linear) region 8 A higher E value indicates a material that is more: a Ductile b Malleable c Stiff 9 If a rod of length L is stretched by δL under a force F, which expression relates to Young's modulus? a E = mgh b E = (F/A)/(δL/L) c E = F/δL 10 Which property is NOT described by Young's modulus? a Elastic stiffness b Ductility in plastic deformation c Proportional limit 11 Compute E using F, A, L0, ΔL: F=1000 N, A=5e-3 m^2, L0=2.0 m, ΔL=0.002 m. E = (F L0)/(A ΔL). a 2.0e9 Pa (2 GPa) b 2.0e6 Pa (2 MPa) c 2.0e8 Pa (200 MPa) 12 If stress = 1 MPa and strain = 0.002, what is E? a 1.0e9 Pa (1 GPa) b 5.0e5 Pa (0.5 MPa) c 5.0e8 Pa (500 MPa) 13 F=500 N, A=1e-4 m^2, L0=0.5 m, ΔL=0.001 m. Find E. a 2.5e7 Pa (25 MPa) b 5.0e9 Pa (5 GPa) c 2.5e9 Pa (2.5 GPa) 14 What is the definition of Young's modulus? a E = force/area b E = stress/strain c E = length/area 15 If E = 210 GPa and σ = 3 MPa, find ε. a ε = 0.21 b ε = 0.003 c ε = 1.43e-5 16 Holding F, A, L0 constant, doubling A changes E how? a E remains the same b E halves c E doubles 17 What are the units of Young's modulus? a Newtons (N) b Pascals (Pa) c Meters (m) 18 Relation among quantities: E = ? a E = F×A × ΔL b E = F/(ΔL) c E = (F/A) / (ΔL/L0) 19 If ΔL doubles with the same F, A, L0, what happens to E? a E doubles b E halves c E stays the same 20 ' a ε = 70 b ε = 0.07 c ε = 0.001 21 What does Young's modulus primarily measure in a material? a Density b Stiffness (ratio of stress to strain in the elastic region) c Hardness 22 In the deflection formula delta = PL^3/3EI, what does E stand for? a Bulk modulus b Young's modulus c Shear modulus 23 To design a very stiff beam, which material property is most important? a High fracture toughness b High Young's modulus (stiffness) c Low density 24 What is the unit of Young's modulus? a Joule (J) b Newton (N) c Pascal (Pa) 25 If a beam is loaded and elongation is undesired, what effect does increasing E have on elongation for the same load? a Reduces elongation b Increases elongation c Has no effect 26 For a given force on a cable, what happens to its elongation if E increases? a Elongation increases b Elongation decreases c Length stays same 27 Which material typically has the lowest Young's modulus among common structural materials? a Aluminum b Steel c Rubber 28 Young's modulus applies to which region of the stress-strain curve? a Elastic region b Yield region c Plastic region

Young's Modulus Quiz

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Young's Modulus QuizVersion en ligne

par MERCY MUTUNGA

What does Young's modulus (E) measure in a material?

Which units are used for Young's modulus in the SI system?

If a material's Young's modulus is high, it means the material is:

Which quantity is directly proportional to stress in Hooke's law for small deformations?

For a given material, how does increasing temperature generally affect Young's modulus?

Which physical concept is used to define E = stress/strain?

Young's modulus is most meaningful in which region of a material's stress-strain curve?

A higher E value indicates a material that is more:

If a rod of length L is stretched by δL under a force F, which expression relates to Young's modulus?

Which property is NOT described by Young's modulus?

Compute E using F, A, L0, ΔL: F=1000 N, A=5e-3 m^2, L0=2.0 m, ΔL=0.002 m. E = (F L0)/(A ΔL).

If stress = 1 MPa and strain = 0.002, what is E?

F=500 N, A=1e-4 m^2, L0=0.5 m, ΔL=0.001 m. Find E.

What is the definition of Young's modulus?

If E = 210 GPa and σ = 3 MPa, find ε.

Holding F, A, L0 constant, doubling A changes E how?

What are the units of Young's modulus?

Relation among quantities: E = ?

If ΔL doubles with the same F, A, L0, what happens to E?

'

What does Young's modulus primarily measure in a material?

In the deflection formula delta = PL^3/3EI, what does E stand for?

To design a very stiff beam, which material property is most important?

What is the unit of Young's modulus?

If a beam is loaded and elongation is undesired, what effect does increasing E have on elongation for the same load?

For a given force on a cable, what happens to its elongation if E increases?

Which material typically has the lowest Young's modulus among common structural materials?

Young's modulus applies to which region of the stress-strain curve?