Stress and Strain in Biomechanics: A Comprehensive Guide for Sport Science Students

Question 1

Which of these is NOT a type of stress that materials can experience?

Accepted Answer

Volume stress

Answer

Tensile stress

Answer

Shear stress

Question 2

Which of the following is NOT a type of mechanical stress?

Accepted Answer

Hydrostatic stress

Answer

Tensile stress

Answer

Compressive stress

Answer

Shear stress

Question 3

Which of the following is NOT a correct statement about stress and strain?

Accepted Answer

Stress and strain are directly proportional to each other in the elastic region of a stress-strain curve.

Answer

Stress is the force per unit area applied to a solid material.

Answer

Strain is a measure of the deformation of a material.

Answer

The units of stress are Newtons per square meter (N/m^2).

Question 4

Which of the following is not a type of strain?

Accepted Answer

Volume

Answer

Tensile

Answer

Compressive

Answer

Shear

Question 5

Define the concept of stress in mechanics.

Accepted Answer

Force applied perpendicular to the surface of a material per unit area

Answer

Internal resistance of a material to external forces

Answer

Change in length or volume of a material due to applied force

Answer

Energy stored in a deformed material relative to its volume

Question 6

Differentiate between tensile and compressive stress.

Accepted Answer

Tensile stress results from pulling forces, while compressive stress arises due to pushing forces.

Answer

Tensile stress is always greater than compressive stress.

Answer

Compressive stress results from pulling forces, while tensile stress arises due to pushing forces.

Question 7

Identify the material that typically exhibits the highest Young's Modulus:

Accepted Answer

Steel

Answer

Plastic

Answer

Wood

Answer

Rubber

Question 8

Which factors influence the stress experienced by a material?

Accepted Answer

Applied force, cross-sectional area, and material properties

Answer

Applied force and material properties only

Answer

Cross-sectional area and material properties only

Question 9

Identify an example of a ductile material:

Accepted Answer

Copper

Answer

Glass

Answer

Concrete

Answer

Cast iron

Question 10

What factors can affect the strain experienced by a material?

Accepted Answer

Applied force, material properties, and shape of the object

Answer

Material properties and shape of the object only

Answer

Applied force and shape of the object only

Question 11

Which of the following is NOT a unit of stress?

Accepted Answer

Watts

Answer

Newtons per square meter

Answer

Pascals

Answer

Megapascals

Question 12

When a material is stretched, it undergoes:

Accepted Answer

Tensile stress

Answer

Shear stress

Answer

Compressive stress

Question 13

The elastic modulus of a material is a measure of its:

Accepted Answer

Stiffness

Answer

Toughness

Answer

Density

Answer

Strength

Question 14

Which of the following is a common application of stress analysis in sport science?

Accepted Answer

Optimizing the design of athletic equipment

Answer

Analyzing fluid dynamics

Answer

Calculating financial risk

Answer

Predicting weather patterns

Question 15

A material with an elastic modulus of 200 Gigapascals experiences a strain of 0.002. What is the resulting stress in the material?

Accepted Answer

400 Megapascals

Answer

4 Gigapascals

Answer

40 Megapascals

Answer

0.4 Megapascals

Question 16

Which of the following stress-strain curves represents a material with high toughness?

Accepted Answer

A curve with a large area under the graph

Answer

A curve with a low elastic modulus

Answer

A curve with a high elastic modulus

Answer

A curve with a small area under the graph

Question 17

When a material experiences an increase in length due to the application of a stretching force, this is referred to as:

Accepted Answer

Tensile strain

Answer

Shear strain

Answer

Compressive strain

Answer

Bulk strain

Question 18

Which material is most likely to exhibit elastic behavior, returning to its original shape and size after deformation?

Accepted Answer

Rubber

Answer

Concrete

Answer

Glass

Answer

Plastic

Question 19

When analyzing a stress-strain graph, what kind of behavior is indicated by a linear relationship between stress and strain?

Accepted Answer

Elastic

Answer

Plastic

Answer

Brittle

Answer

Viscoelastic

Question 20

What happens to a material when it is subjected to a force that exceeds its yield strength?

Accepted Answer

It undergoes permanent deformation

Answer

It returns to its original shape

Answer

It becomes stiffer

Answer

It shatters

Question 21

In sports science, stress and strain analysis is commonly applied in:

Accepted Answer

Designing athletic footwear

Answer

Measuring the wind resistance of a car

Answer

Calculating the power output of an engine

Answer

Analyzing the strength of bridges

Question 22

What is the fundamental distinction between stress and strain?

Accepted Answer

Stress measures force per unit area, while strain quantifies the deformation of a material.

Answer

Stress is a measure of area, while strain is a measure of force.

Answer

Stress is a measure of force, while strain is a measure of deformation.

Answer

Stress quantifies the deformation of a material, while strain measures force per unit area.

Question 23

Which material is likely to possess a higher Young's modulus, indicating greater stiffness?

Accepted Answer

Steel

Answer

Water

Answer

Foam

Answer

Rubber