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# Mass from Acceleration and Radius

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Equation / Last modified by KurtHeckman on 2017/10/09 16:16
`M = `

Mass from Acceleration and Radius

Variable | Instructions | Datatype |
---|---|---|

`(a)"Acceleration at Planet's Surface"` | Enter the accleration due to gravity at the planet's surface. | Decimal (m/s²) |

`(r)"Radius of Planet"` | Enter the radius of the planet. | Decimal (m) |

Type

Equation

Category

vCommons

Contents

2 variables

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ID

sspickle.Mass from Acceleration and Radius

UUID

3639c94e-8fbf-11e6-9770-bc764e2038f2

The **Planet's Mass from Acceleration and Radius** calculator computes the mass of planet or moon based on the radius (**r**), acceleration due to gravity on the surface (**a**) and the universal gravitational constant (G).

**INSTRUCTIONS:** Choose the preferred units and enter the following:

- (
**r**) This is the radius of the planet. - (
**a**) This is the acceleration due to gravity on the surface of the planet.

**Planetary Mass (M):** The calculator returns the mass (**M**) in kilograms. However, this can be automatically converted into other mass units via the pull-down menu including the following:

- Earth Masses
- Jupiter Masses
- Solar Masses

### The Math / Science

Compute the mass of a planet given the acceleration at the surface and the radius of the planet.

This equation,

**Mass from Acceleration and Radius**, references 1 equation/constant.**Equations and Constants **

This equation,

**Mass from Acceleration and Radius**, is used in 2 calculators.**Calculators**