The image above represents gravitational acceleration.

To compute for gravitational acceleration, three essential parameters are needed and these parameters are **Gravitational Constant (G), Mass of the Earth (m _{E}) **and

**Radius of the Earth (R).**

The formula for calculating gravitational acceleration:

a = ^{GmE} / _{R²}

Where:

a = Gravitational Acceleration

G = Gravitational Constant

m_{E} = Mass of the Earth

R = Radius of the Earth

Let’s solve an example;

Find the Gravitational acceleration when the gravitational constant is 6.67E-11, the mass of the earth is 12 and the radius of the earth is 21.

This implies that;

G = Gravitational Constant = 6.67E-11

m_{E} = Mass of the Earth = 12

R = Radius of the Earth = 21

a = ^{GmE} / _{R²}

a = ^{(6.67e-11)(12)} / _{(21)²}

a = ^{8.004e-10} / _{441}

a = 1.81e-12

Therefore, the **gravitational acceleration **is **1.81e-12 m/s.**

**Calculating Mass of the Earth when the Gravitational Acceleration, the Gravitational Constant and the Radius of the Earth is Given.**

m_{E} = ^{a x R²} / _{G}

Where;

m_{E} = Mass of the Earth

a = Gravitational Acceleration

G = Gravitational Constant

R = Radius of the Earth

Let’s solve an example;

Find the mass of the earth when the gravitational acceleration is 25, the gravtitaional constant is 6.67E-11 and the radius of the earth is 2.

This implies that;

a = Gravitational Acceleration = 25

G = Gravitational Constant = 6.67E-11

R = Radius of the Earth = 2

m_{E} = ^{a x R²} / _{G}

m_{E} = ^{25 x 2²} / _{6.67E-11}

m_{E} = ^{25 x 4} / _{6.67E-11}

m_{E} = ^{100} / _{6.67E-11}

m_{E} = 14.99e+10

Therefore, the **mass of the earth **is **14.99e+10 m.**

Nickzom Calculator – **The Calculator Encyclopedia** is capable of calculating the gravitational acceleration.

To get the answer and workings of the gravitational acceleration using the **Nickzom Calculator – The Calculator Encyclopedia. **First, you need to obtain the app.

You can get this app via any of these means:

**Web** – https://www.nickzom.org/calculator-plus

To get access to the **professional **version via web, you need to **register** and **subscribe **for** NGN 2,000 **per** annum** to have utter access to all functionalities.

You can also try the **demo **version via https://www.nickzom.org/calculator

**Android (Paid)** – https://play.google.com/store/apps/details?id=org.nickzom.nickzomcalculator

**Android (Free)** – https://play.google.com/store/apps/details?id=com.nickzom.nickzomcalculator

**Apple (Paid)** – https://itunes.apple.com/us/app/nickzom-calculator/id1331162702?mt=8

Once, you have obtained the calculator encyclopedia app, proceed to the **Calculator Map, **then click on **Geology**** **under **Add-on****.**

Now, Click on **Gravity **under **Geology**

Now, Click on **Gravitational Acceleration **under **Gravity**

The screenshot below displays the page or activity to enter your values, to get the answer for the gravitational acceleration according to the respective parameters which are the **Gravitational Constant (G), Mass of the Earth (m _{E}) **and

**Radius of the Earth (R).**

Now, enter the values appropriately and accordingly for the parameters as required by the **Gravitational Constant (G), Mass of the Earth (m _{E}) **and

**Radius of the Earth (R).**

Finally, Click on Calculate

As you can see from the screenshot above, **Nickzom Calculator**– The Calculator Encyclopedia solves for the gravitational acceleration and presents the formula, workings and steps too.