What is the internal resistance and stress?

Stress is the internal resistance, or counterforce, of a material to the distorting effects of an external force or load. These counterforces tend to return the atoms to their normal positions. The total resistance developed is equal to the external load. This resistance is known as stress.

Is stress a internal resistive force?

In simple terms we can define stress as the force of resistance per unit per unit area, offered by a body against deformation. Stress is the ratio of force over area (S =R/A, where S is the stress, R is the internal resisting force and A is the cross-sectional area).

When an external force is applied on a body an internal resistance is developed inside the body?

When an external force is applied on a body, internal resistance is developed within the body to balance the effect of externally applied forces. The resistive force per unit area is called as stress.

What type of force does a stress produce?

Stress is the result of internal forces, or forces that result when internal particles react to each other. Force is the measure of the amount of energy that’s applied to an object. These internal forces are caused when a load is applied to an object.

What is internal resistance force?

Electromotive force is defined as energy per unit charge. Internal resistance provides an explanation for varying terminal potential difference under load.

What is the internal resistance set up in a material when an internal force is applied?

The body develops an internal resistance against the deforming forces. The external forces acting on a rigid body are termed loads, the deformation is known as strain, and the internal resistance to the external force is called stress.

What is stress force?

Stress is the force per unit area on a body that tends to cause it to change shape. In SI units, force is measured in newtons and area in square metres. This means stress is newtons per square meter, or N/m2. However, stress has its own SI unit, called the pascal. 1 pascal (symbol Pa) is equal to 1 N/m2.

How is stress related to force?

Stress is the measure of an external force acting over the cross sectional area of an object. Stress has units of force per area: N/m2 (SI) or lb/in2 (US). The SI units are commonly referred to as Pascals, abbreviated Pa. Normal Stress and 2.

What is internal and external forces?

External forces are forces caused by external agent outside of the system. Internal forces are forces exchanged by the objects in the system.

What are examples of internal forces?

Any force that acts on a structure from within is known as the internal force….Examples

• Hitting a Ball.
• A Tree Trembling due to Wind.
• Bending a Scale.
• Pushing a Bus.
• Spring Action.
• Pushing a Chair.
• Compressing a Sponge.
• Stretching a Rubber Band.

What is internal stress in mechanics?

In continuum mechanics, stress is a physical quantity that expresses the internal forces that neighbouring particles of a continuous material exert on each other, while strain is the measure of the deformation of the material.

How do you find internal resistance?

The relationship between internal resistance (r) and emf (e) of cell s given by. Where, e = EMF i.e. electromotive force (Volts), I = current (A), R = Load resistance, and r is the internal resistance of cell measured in ohms….Internal Resistance Formula.

What is the relationship between stress and resistance?

These counterforces tend to return the atoms to their normal positions. The total resistance developed is equal to the external load. This resistance is known as stress. Although it is impossible to measure the intensity of this stress, the external load and the area to which it is applied can be measured.

What is the internal resistance of a material to external forces?

Stress is the internal resistance, or counterforce, of a material to the distorting effects of an external force or load. These counterforces tend to return the atoms to their normal positions. The total resistance developed is equal to the external load. This resistance is known as stress.

What is the relationship between work force and stress?

(Work is equal to force times the distance the force moves.) Stress is the internal resistance, or counterforce, of a material to the distorting effects of an external force or load. These counterforces tend to return the atoms to their normal positions. The total resistance developed is equal to the external load.

Why are tensile and compressive stresses called normal stresses?

Because tensile and compressive loads produce stresses that act across a plane, in a direction perpendicular (normal) to the plane, tensile and compressive stresses are called normal stresses. The shorthand designations are as follows.