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WorksheetsLesson 1 Basic Stress and Strain
Total questions: 15
Worksheet time: 8mins
What is the unit of stress?
Newton (N)
Pascal (Pa)
Joule (J)
Meter (m)
What does strain measure?
Change in area
Change in length divided by original length
Force applied to an object
Stress over time
What is the formula for stress?
σ = F * A
σ = F/A
σ = A + F
σ = A/F
What is Young's Modulus?
Area divided by force
Stress divided by strain
Force divided by area
Strain divided by stress
What does the elastic limit represent in a stress-strain graph?
The yield stress
The breaking point
The point of maximum stress
The point where the material returns to its original state
What is the yield stress?
The stress at the breaking point
The maximum stress a material can endure
The stress at which a material begins to deform plastically
The stress that causes elastic deformation
In the context of stress and strain, what does Hooke's Law state?
Strain is proportional to stress
Stress is proportional to area
Strain is independent of stress
Stress is constant for all materials
What is the breaking point in a stress-strain graph?
The point of maximum elastic deformation
The point of maximum stress
The point where the material breaks
The point where the material starts to yield
What is the relationship between stress and force?
Stress increases with decreasing force
Stress decreases with increasing force
Stress is independent of force
Stress is directly proportional to force
What is the formula for calculating strain?
Strain = Change in length / Original length
Strain = Stress / Young's Modulus
Strain = Original length / Change in length
Strain = Force / Area
What does the area under the stress-strain curve represent?
Energy absorbed by the material
Total stress applied
Total strain experienced
Maximum force applied
What is the significance of the Young's modulus value?
It indicates the ductility of a material
It measures the stiffness of a material
It determines the breaking point
It shows the yield stress
What happens to a material when it reaches its ultimate tensile strength?
It becomes more elastic
It returns to its original shape
It breaks
It begins to yield
What is the cross-sectional area of a wire with a diameter of 0.4 mm?
0.125 mm²
0.126 mm²
0.2 mm²
0.4 mm²
What is the primary difference between stress and force?
Stress does not depend on area, while force does
Stress is measured in newtons, while force is measured in pascals
Stress is always greater than force
Stress is a property of the material, while force is an external factor
