The force of gravity on the earth's surface on a mass equal to one avoirdupois pound is defined as pound force. Its metric unit equivalency, the Newton [N], is 1 lbf = 4.448221, 152605 N. Although the English and American customary systems of weights and measures are not equivalent, for **most practical purposes** one pound force is equal to 14.567453 ounces (or 140 grams) of pressure.

In physics and engineering, energy is defined as the capacity of **any physical system** to do work. Energy in physics includes **both potential energy and kinetic energy**. In mathematics, energy is used as a general term for the quantity calculated by taking the square of the sum of the squares of the components of a vector, or more generally for the scalar product of two vectors. Energy is also used in chemistry to describe the molecular interaction between atoms or molecules within a compound or between compounds in a mixture. In astronomy, energy is defined as the rate at which power is absorbed or released by a body as it changes its state from solid to liquid or vapor to gas. The four major classes of astronomical energy sources are radiation, magnetic fields, motion, and electricity/magnetism.

Energy can be transformed from one form to another with no loss of value.

The pound-force is equal to one pound's mass multiplied by the standard acceleration due to gravity on Earth (exactly 9.806 65 m/s2, or about 196,133/6096 ft/s2, or approximately 32.174 05 ft/s2).

Since mass is proportional to the cube of the length, this means that the pound-force is proportional to the square of the length.

Thus two objects made of **the same material** and having the same shape but different lengths will have different pound-forces applied to them because their forces are proportional to the length.

This means that when comparing objects made of the same material and with the same shape, you should always compare their pounds forces instead of their masses. For example, a 20-pound rock will exert a much greater force than a 10-pound rock if they are both placed on the ground and pressed down equally.

Since force is defined as the product of mass and acceleration, this means that the pound-force is also proportional to the square of the speed of an object moving under **its own weight**.

So if an object is being pushed up against something hard enough that it stops accelerating, then the pound-force it takes to do so is constant, regardless of how fast it was going when it reached **that point**.

667.23324 Newton = 150 Pound Force (lbf) Pound Force: The pound force, often known as the pound, is a unit of force in several measuring systems, such as British engineering units and British gravitational units. It is the gravitational force exerted on a mass of one avoirdupois pound on the Earth's surface. It has the symbols lb, lbf, and lbf.synopsis. It is defined as being equal to 4.5 x 10^7 N, or 1 newton per **square meter**.

The gravitational force exerted on a mass of one avoirdupois pound on the Earth's surface is equal to the pound-force. As a result, a defined number for acceleration due to gravity was required. The new definition gives a value of **980,000 pounds** per square foot, or 32.2 pounds per **square inch**.

The conversion factor from forces to acceleration is not arbitrary but rather follows from Newton's law of universal gravitation. It also assumes that the source of the force is directly over the point where its effect is being measured. If there were another object in between, then its weight would have to be taken into account when calculating the force on the first object. For example, if there were two objects of mass 1 kg and 2 kg respectively connected by a string so that they formed **a single unit** weighing 2 kg then their combined force would be half what it would be if they were not connected.

In physics and engineering, an acceleration is the rate at which the velocity of a body changes with time. For objects on earth, this can be calculated using Newton's Law of Motion: F = m * a Where F is the force acting on the object, m is its mass, and a is its acceleration (m/s2).

4.4482216 newtons are equivalent to one pound of force (lbf). To convert pounds of force to newtons, multiply the value of the pound force by 4.4482216. To convert 120 pounds to newtons, for example, multiply 120 by 4.4482216. That equals 533.786592 N, or 120 lbf.

The international standard symbol for the pound as a unit of mass is lb. In the "engineering" systems (middle column), the weight of the mass unit (pound-mass) on Earth's surface is approximately equal to **the force unit** (pound-force). This is convenient because **one pound** of mass exerts one pound of force due to gravity. However, this relationship doesn't hold true for **all masses**. The figure shows that the weight of a pound of water is much less than 1 pound, and the weight of a pound of gold is much more than 1 pound.

In the scientific systems (right column), the pound is defined in terms of the avoirdupois pound which has exactly 0.45359237 kg of material. This means that the force exerted by 1 pound of mass in avoirdupois units is also 0.45359237 N. Since the value of N depends on the nature of matter, this definition makes the pound a matter-specific unit.

It is important to understand that the pound is not a physical object but a legal measure of mass. There are 705.48 grains and 22 lumps of gold in an avoirdupois pound. All objects on Earth have their own specific weights regardless of what system they are measured in. For example, an ice cream scoop weighs about 11/4 pounds while a tesla coil is about 100 pounds.