Biomechanics U1

Front

What is a Newtonian fluid?

Back

A Newtonian fluid is a fluid whose stress is directly proportional to the rate of strain, meaning its viscosity remains constant regardless of the applied stress.

Front

What is a non-Newtonian fluid?

Back

A non-Newtonian fluid is a fluid whose viscosity changes with the applied stress or strain rate, meaning it does not have a constant viscosity.

Front

What is the Reynolds Number?

Back

The Reynolds Number is a dimensionless quantity used to predict flow patterns in different fluid flow situations, defined as the ratio of inertial forces to viscous forces.

Front

What is specific gravity?

Back

Specific gravity is the ratio of the density of a substance to the density of a reference substance, typically water at 4°C.

Front

At what temperature is water considered heavier for specific gravity?

Back

Water is considered heavier at 4°C.

Front

What determines the strength of a material?

Back

The strength of a material is usually determined by stress, which is the force applied per unit area.

Front

What is stress in the context of biomechanics?

Back

Stress is defined as the internal force per unit area within materials that arises from externally applied forces, uneven heating, or permanent deformation.

Front

What is strain?

Back

Strain is the measure of deformation representing the displacement between particles in a material body, defined as the change in length divided by the original length.

Front

What is viscosity?

Back

Viscosity is a measure of a fluid's resistance to flow, indicating how thick or sticky a fluid is.

Front

What is shear in biomechanics?

Back

Shear refers to the force that causes layers of material to slide past each other, often resulting in deformation.