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WorksheetsBiomechanics of Loads
Total questions: 15
Worksheet time: 10mins
Loads applied to to the bone can be from .........
External loads
Internal loads
Non of the above
All of the above
Magnitude of bending stress at neutral axis of bone equals
Maximum tension
Minimum bending
Zero magnitude
Minimum tension
Maximum compression
Shear stress acts ........... to the plane
Perpendicular
Parallel
Close
Non of the above
Inter-molecular resistance generated inside a structure due to application of outside loading is
Strain
Elasticity
Pascal
Stress
Shear
When a subject stands on his toes, the type of stress on calcaneous is
Shear
Torsion
Compression
Tension
If bone yielding occurs at 4% strain and bone fracture occurs at 11% strain so the total plastic part strain equals .......... %
7
4
11
15
The strain of an elastic material of 20 cm length when it is loaded till reaching 34 cm equals
0.3
0.7
0.9
1
Strain of a bone of 30 cm length when it is compressed till reaching 29 cm equals ?
0.3
0.03
0.5
30%
The following is true about the elastic part of stress strain curve of bone
Part of stored bone energy is absorbed
Represents bone ductility
More steep line indicates more stiffness
Steep line in cancellous bone
Disobeys Hook's law
Application of force that twists a material around its longitudinal axis is called
Shear
Torque
Displacement
Torsion
Young's (elastic) Modulus is
Change in length / Original length
Its unit of measurement is kg.m
Slope of stress strain curve
Stress / Area
Deformation of bone
Increasing length of the plastic part of bone stress strain curve means increasing bone
Hardness
Stiffness
Stored energy
Stress
Ductility
If tensile force of 600 N is applied on a bone causing stress of 100 Pascal with a deformation of 30% the young's modulus is ......
100 Pascal
3.3 Pascal
6 Pascal
50 Pascal
20 Pascal
Shear is considered a
Force applied to the bone having no direct support from the structure.
Force applied parallel to surface causing internal deformation in an angular direction.
Pulls or stretches the bone to cause lengthening and narrowing.
Presses ends of bones together to cause widening and shortening.
Bending Force includes .........
Compression
Tension
Shear
All of the above
