# What is g in physics

## Weight force (physics)

**This article deals with the so-called weight force. We will explain to you what weight force is and how to calculate it. This article belongs to our physics section.**

Before we get into weight, you should read the following headings. If these topics seem unfamiliar to you, be sure to read them up. Without this knowledge, you may have problems understanding this article.

Show:**Mass and weight**

The earth - and also other planets - attract bodies in their environment. For this reason, the bodies act with a certain force on a base or pull on a suspension. The weight - often with the symbol G or F_{G} - indicates the force with which a body presses on a surface. The weight is given in Newtons.

The question now arises how to calculate the weight force. The answer is actually quite simple: the weight is the product of the mass multiplied by the acceleration. The mass is given in kg and is the same everywhere, regardless of whether on earth or the moon. The acceleration, on the other hand, is location-dependent. If you are on a mountain, you have to apply a different acceleration than on the surface of the sea or on the moon.

Show:**Calculate weight force**

In the following we would like to calculate the weight force. We take a look at the weight of objects on earth as well as on the moon.

**Formula: Earth weight**

**G = m * g**- "G" is the weight in Newtons [N]
- "m" is the mass of the body in kilograms [kg]
- "g" is the acceleration due to gravity in meters per second square [m / s
^{2}]

When calculating the weight force, g = 9.81 m / s as a rule^{2} set. Our example shows you a calculation of the weight on earth.

**Example: Earth's weight**

A body with a mass of 12kg lies on the ground. What weight does it exert? Solution: The calculation looks very simple: G = 12kg · 9.81m / s^{2}. This results in G = 117.72 N.

**Formula: weight of the moon **

**G**_{MOON}= m a_{MOON}- "G
_{MOON}"is the weight on the moon in Newtons [N] - "m" is the mass of the body in kilograms [kg]
- "a
_{MOON}"is the acceleration of the moon in meters per second square [m / s^{2}]

When calculating the weight on the moon, a_{MOON} = 1.62 m / s^{2} set. Our example shows you a calculation of the weight on the moon.

**Example: the weight of the moon**

A body with a mass of 12kg lies on the bottom of the moon. What weight does it exert? Solution: The calculation looks very simple: G_{MOON} = 12kg · 1.62m / s^{2}. This gives G_{MOON} = 19.44 N.

**Left:**

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