The image above represents period.

To compute for period, two essential parameters are needed and these parameters are **length (l) **and **acceleration due to gravity (g).**

The formula for calculating period:

T = 2π(√(^{l} / _{g}))

Where;

T = Period

l = Length

g = Acceleration due to gravity

Let’s solve an example;

Find the period when the length is 4 and the acceleration due to gravity is 9.8.

This implies that;

l = Length = 4

g = Acceleration due to gravity = 9.8

T = 2π(√(^{l} / _{g}))

T = 2π(√(^{4} / _{9.8}))

T = 2π(√(0.408))

T = 2π(0.6388)

T = 6.28 x 0.6388

T = 4.014

Therefore, the **period **is **4.014 s.**

**Calculating the Length when the Period and the Acceleration due to Gravity is Given.**

l = (^{T} / _{2π})^{2} x g

Where;

l = Length

T = Period

g = Acceleration due to gravity

Let’s solve an example;

Find the length when the period is 28 and the acceleration due to gravity is 9.8.

This implies that;

T = Period = 28

g = Acceleration due to gravity = 9.8

l = (^{T} / _{2π})^{2} x g

l = (^{28} / _{6.28})^{2} x 9.8

l = (4.458)^{2} x 9.8

l = 19.87 x 9.8

l = 194.7

Therefore, the **length **is **194.7.**

**Calculating the Acceleration due to Gravity when the Period and the Length is Given.**

g = ^{l} / (^{T} / _{2π})^{2}

Where;

g = Acceleration due to gravity

T = Period

l = Length

Let’s solve an example;

Find the acceleration due to gravity when the period is 12 and length is 3.

This implies that;

T = Period = 12

l = Length = 3

g = ^{l} / (^{T} / _{2π})^{2}

g = ^{3} / (^{12} / _{6.28})^{2}

g = ^{3} / (_{1.91})^{2}

g = ^{3} / _{3.648}

g = 0.82

Therefore, the **acceleration due to gravity **is **0.82.**

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

To get the answer and workings of the period 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 1,500 **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 **Motion**** **under **Physics****.**

Now, Click on **Period**** **under **Motion**

The screenshot below displays the page or activity to enter your values, to get the answer for the period according to the respective parameters which are the **length (l) **and **acceleration due to gravity (g).**

Now, enter the values appropriately and accordingly for the parameters as required by the **length (l) **is **4 **and **acceleration due to gravity (g) **is **9.8.**

Finally, Click on Calculate

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