# Physical Force Calculator

Calculate the force from mass and acceleration, with different units. In physics, force is one of the most important quantities, it is something, which when unopposed, accelerates a motion, or causes deformation. The formula is F=M*a. The unit of the force is Newton, this is calculated as kilograms time meters per square second, N=kg*m/s². The average gravitational acceleration on Earth is 1 g or 9.80665 m/s².

Example: a body with a mass of 150 grams, which is accelerated with 3 m/s², experiences a force of 450 millinewtons.

The unit of force is the Newton, named after Isaac Newton. Newton as a unit has been around since 1913, it has been officially since 1948 and part of the International System of Units SI since the 1960s. In the 1670s, Isaac Newton described gravity, also known as attraction. This force causes two objects to accelerate towards each other. If one object is significantly larger than the other, then this acceleration is only noticeable in the much smaller object. Like the famous apple, which is accelerated by the earth and of course you don't notice the earth's acceleration due to the apple. Newton may have gotten the idea after seeing an apple fall from a tree, but the veracity of this story is disputed.

Weight is a force, but is often expressed in units of mass, usually kilograms. The correct unit for weighing is newton. In practice, both are possible, since you are usually on earth, where the attraction is fairly constant and therefore newtons and kilograms can be converted using a simple factor. This factor is the gravitational acceleration of 9.81 m/s², equivalent to 9.81 N/Kg. One kilogram has a weight of almost 10 newtons on earth.