Physics

Difference between force and pressure

There is a difference between force and pressure, two terms that, although they have applications depending on the interaction of one body with another and with the earth, are not the same. It is common for us to confuse force with pressure. However, they are two different physical terms. The main difference between force and pressure is that force is an agency that stops or tends to stop, moves, or tends to move the movement of a body and pressure is the force that normally acts per unit area on the surface of a body.

Key difference

  • Force is the energy applied to an object to change its direction of motion, while pressure is the force that is spread over a particular area of ​​an object on which it acts.
  • The international standards unit of measurement for force is Newton represented by N on the other side, the international standards unit of measurement for pressure is Pascal, scientifically represented as (Pa).
  • The instrument for measuring force is the dynamometer, while the instrument that measures pressure is the manometer.
  • A force is a vector quantity with the ability to deform or cause a change in the state of motion or rest of an object.
  • The force applied from one direction changes the speed of the object; Besides; pressure does not change the velocity of the object.
  • Pressure is a scalar quantity, conversely, force is a vector quantity.
  • The force acts on the face, the edges or the side of the object, on the contrary, the pressure only acts on the face / surface of the object.
  • Pressure is a physical quantity that measures the force acting in a perpendicular direction on an area or line.
  • The force is independent of the surface while the pressure depends on the association of a force acting on a given surface.
  • Force is a vector quantity with the ability to cause a change in the state of motion or rest of an object, while pressure is a physical quantity that measures the force acting in a perpendicular direction on an area or line.

Difference between force and pressure in Tabular Form

ForcePressure
DefinitionThe action of pushing and pulling results in the change of direction, movement, and pressure.Amount of force applied to a surface per unit area
Measuring InstrumentDynamometerPressure gauge
UnitNewtons (N)Pascals (Pa)
Applied toEdges, sides, verticesFaces, surfaces
Nature of quantityIt is a vector quantity with the ability to cause a change in the state of motion or the rest of an object.it is a Scalar quantity that indicates the force acting on a given area. That is force per unit area.
It is independent of the surface.It depends on the association of a force acting on a certain surface.
Causes an acceleration.It is the relationship between force and area.

Force vs Pressure – Overview

Force is defined as the energy applied to an object to change its direction of motion. Pressure is defined as the force that is extended over a particular area of ​​an object on which it acts. The international standards unit of measurement for force is Newton represented by N.

The international standard unit of measurement for pressure is Pascal, scientifically represented as (Pa). Force and pressure are measured with different instruments. Force is measured with an instrument called a dynamometer. The instrument for measuring pressure is known as a manometer.

Force is a vector quantity because it has magnitude and direction. Pressure is a scalar quantity since it has magnitude but no direction. Force, if applied from one direction, can change the speed of the object.

Pressure does not change the speed of the object. The force acts on the face, edges, side, or vertices of the object. The pressure only acts on the face or surface of the object. Force is the effect produced by the interaction of two objects that tries to change the state of the object.

Pressure is the force acting on the surface of the object in a perpendicular direction resulting in the dispersion of the force over a given area. If the force is applied over a large area, the resulting pressure will be low, and if it is applied the same force in a small, the pressure will be high.

Newton’s law measures force, F = m X a. The formula used to find the pressure is P = F / A. It is the force acting on the surface of the object in a perpendicular direction that results in the dispersion of the force over a given area.

If the force is applied over a large area, the resulting pressure will be low, and if the same force is applied over a small area, the pressure will be high. Newton’s law measures force, F = m X a.

The formula used to find the pressure is P = F / A. Pressure is the force acting on the surface of the object in a perpendicular direction that results in the dispersion of the force over a given area.

If the force is applied over a large area, the resulting pressure will be low, and if the same force is applied over a small area, the pressure will be high. Newton’s law measures force, F = m X a. The formula used to find the pressure is P = F / A.

What is the Force?

The term “force” means the push or pull caused by the interaction of two objects, which changes or seeks to change the state of the object. It is a vector quantity that has both magnitude and direction. Magnitude is the amount of force. The greater the magnitude, the greater the applied force and vice versa.

In simple words, it is any influence that changes the state of rest or movement of the body. It is the pull or push of an object that changes the speed of the object on which it is applied. If force is applied to an object from a direction without opposing force, the object will move.

If it is already moving, it will become faster or slower depending on the direction of the applied force. It is represented by magnitude and direction. The great physician Isaac Newton described force in his first law of motion. According to this, a force must be applied to the body to change the direction of an object’s motion.

Force is measured by Newton’s law, F = m X a. “F” means force, “m” means mass, and “a” means acceleration. Acceleration is the rate of change in velocity. From this, we can describe a force as an interaction that causes acceleration. There are two types of forces: contact force and non-contact force.

The force is nothing more than a vector magnitude that measures the rate of change of linear moment between particles or systems of particles, it is also a vector physical magnitude capable of deforming bodies. The traditional or classical definition of force is that it is an agent capable of modifying the amount of movement or the shape of materials.

According to the International System of Units, the unit used to define force is the Newton, represented as N. It is a derived unit that is defined as the force necessary to provide an acceleration of 1 m / s² to an object of mass 1 kg. It is a mathematical model that defines the intensity of the interactions between objects. In physics, two types of equations are used for force, the causal ones that specify the origin of attraction or repulsion, and those for effects.

Force can be defined as the physical magnitude that manifests itself in a linear way and that represents the intensity of change between two particles or bodies. This means that force is the ability of a body to resist a push or support a weight. In other words, force is any action, effort or influence that can alter the state of motion or rest of a given body, so that a force can accelerate an object, modifying its speed, direction or direction. of its movement.

Force is represented by the newton, which is its unit of measurement, whose symbol is the capital ene (N) and is measured with a device called a dynamometer. Two types of force are distinguished based on the distance between the bodies:

  • Contact forces: are those that are produced by the interaction of bodies that must be in direct contact.
  • The force at a distance: they occur even when the bodies are separated but their gravitational fields interact.

On the other hand, depending on the energy, the following can be distinguished:

  • The elastic force: it is the one exerted by a body when its position is not normal.
  • The electrical force: it is the one that produces attraction or repulsion between bodies.
  • The friction force: it is the one exerted by the bodies when they slide one over the other.

What is pressure?

Pressure is the amount of force that is applied to any surface per unit area. It is the force that acts perpendicular to the surface of an object, which causes the force to spread over a certain area. Pressure considers the area over which the force is exerted.

The pressure is low when the force is spread over a large area, while the resulting pressure would be high if the same force is spread over a small area. Pressure is the force produced by continually pushing or pressing an object by some other object.

It is explained as the force applied to a unit area. The formula used to find the pressure is P = F / A, where “P” means “pressure,” “F” means “force,” and “A” means “area.” If the force is applied over a large area, then the pressure developed is less compared to that of a smaller area.

Pascal’s law is the unit of pressure. It is a scalar quantity since it does not depend on the direction but on the magnitude. The surface of the object, which is immersed in a fluid, experiences pressure due to the weight of the fluid on it. We experience atmospheric pressure all the time, due to the weight of the air above us.

Our blood pressure that is exerted from inside the body prevents it from imploding under atmospheric pressure. Units of atmospheres (atm) are also used to measure pressure sometimes. (1 atm = 101325 Pa).

Our blood pressure that is exerted from inside the body prevents it from imploding under atmospheric pressure. Units of atmospheres (atm) are also used to measure pressure sometimes. (1 atm = 101325 Pa). Our blood pressure that is exerted from inside the body prevents it from imploding under atmospheric pressure. Units of atmospheres (atm) are also used to measure pressure sometimes. (1 atm = 101325 Pa).

Pressure is a physical quantity that measures the force in a perpendicular direction per unit area. It characterizes how a certain force is applied to a line. For the International System of Units, pressure is measured as a derived unit called Pascal or Pa. It is equal to the total force of one newton acting uniformly on one square meter. In the English system, pressure is measured in pounds per square inch, it is equal to a total force of one pound acting on one square inch.

Pressure can be defined as the force exerted by a matter in a solid, liquid or gaseous state on a given surface. Pressure is used to characterize how a certain resultant force is applied on a surface, since it is equivalent to the force that acts on the unit of surface and is given by the quotient that results from the force on the area where it is applied.

There are different types of pressure among which are mentioned:

  • Atmospheric pressure (weight of air at sea level).
  • Barometric pressure (pressure above or below sea level that is measured with a barometer).
  • Gauge pressure (measured in a closed container or tank).
  • Absolute pressure (pressure of a fluid measured with reference to vacuum).
  • Relative pressure (is the difference or subtraction between atmospheric pressure and gauge pressure).

Conclution

Both force and pressure are physical entities, but they are different from each other in many ways.

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