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WorksheetsDeformation of solid
Total questions: 10
Worksheet time: 7mins
What is the correct unit for strain?
Pa
Nm-2
No unit
Nm2
Select all the correct units for stress.
Pa
Nm-2
Nm2
No unit
The Young's Modulus is defined as...
The gradient of a stress strain graph
The energy required to stretch a material.
Stress/Strain
Force/Extension.
Hooke's law states that
the extension is proportional to the load when the elastic limit is not exceeded
the extension is inversely proportional to the load when the elastic limit is not exceeded
the extension is independent of the load when the elastic limit is not exceeded
load is dependent on extension
At ‘yield point’ of a copper wire
the load hasn't exceeded the elastic limit yet; so, Hooke's law applies
the load has already exceeded the elastic limit and the material has become plastic
even the plastic stage has passed and the wire has snapped already
Like Brass and Bronze, Copper has no yield point
If the length of wire is stretched by a load is doubled, then it's Young's modulus will be
doubled
halved
becomes four times
unaffected
Substances that elongate considerably and undergo plastic deformation before they break are known as
brittle material
ductile material
stiff material
plastic material
Copper has been used in electrical wiring since the invention of the electromagnet and the telegraph in the 1820's. What property of solid best describe this material?
Porosity
Malleabilty
Brittleness
Ductility
What is the correct formula for Young Modulus
Y=AeFl
F=leYA
l=AF
Y=ϵσ
What is the area under graph for stress versus strain .....
spring constant, k
strain energy per unit volume,
strain energy, U
elongation, e
no area under graph
