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Which languages is Nakafa in?

English, Indonesian and German.

Is Nina always right?

Not always. Nina can be wrong, so check again with the lesson or the question.

AI credits are used when Nina answers your question. One answer uses 5 credits.

What happens when my credits run out?

Nina is available again once your credits renew. Lessons, exercises and try-outs keep working.

Where do I manage what Nina remembers?

In Settings, open Memory. There you can read, change, pause or delete what Nina remembers.

Is your data still yours?

Nakafa does not sell your personal data, and you can delete any chat or any memory Nina keeps.

How does Nakafa keep its content accurate?

All content is written by qualified contributors. Because it is source-available, anyone can review a lesson and suggest a fix.

Nakafa

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How does projectile motion work?

Read this first.

Lessons that are easy to read

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Initial speed: $v_0=22\text{ m/s}$
Time in the air: $T=3.1\text{ s}$
Range: $R=48.4\text{ m}$
Peak height: $h_{\max}=12.1\text{ m}$

\sin\theta = \frac{\sqrt{2}}{2}

\cos\theta = \frac{\sqrt{2}}{2}

\tan\theta = 1

\theta = 45^\circ

0.79 Radian

Atomic number: $Z = 20$
Configuration: $2, 8, 8, 2$
Outer shell: $\mathrm{N}$
Capacity: $2(4)^2 = 32$

Do I get it yet?

Try one question first.

Practice tests that score you right away

You can repeat them any time.

Diketahui operasi $\triangle(a, b) = ka + \frac{b}{m}$ dengan $k$ dan $m$ adalah bilangan bulat positif. Jika $\triangle(2, 4) = 8$ dan $\triangle(3, 5) = 11$ , maka nilai $\triangle(5, 9)$ adalah ....

This one still confuses me.

Come, let us take it apart together.

Nina knows which part you mean

Ask from the question or lesson you have open.

Why is 13 wrong?

13 comes from taking m as 3

That gives $5(2) + 9/3 = 13$ . The trouble is that $m = 3$ does not fit the question.

Check it against what you know

$\triangle(2, 4) = 2(2) + 4/3 \neq 8$

With $m = 1$ it fits: $2(2) + 4/1 = 8$ . So $m$ must be 1, and the answer is 19.

What if the angle changes?

Watch the ball.

What is hard to picture, you can see

A scene from the Projectile Motion lesson.

Horizontal component: $v_{0x}=20\text{ m/s}$
Vertical component: $v_{0y}=34.6\text{ m/s}$
Peak time: $t=3.5\text{ s}$
Flight time: $T=6.9\text{ s}$
Range: $R=138.6\text{ m}$
Velocity at two seconds: $\vec{v}=\langle 20, 14.6\rangle\text{ m/s}$

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What Nina remembers

Your curriculum may differ. The way you learn stays the same.

Hi, I am Nabil.

I was a student too. I know what it is like to choose between studying and eating.

I think that is not fair. Whether you understand something should not depend on what is in your wallet.

So the basic access to Nakafa is free. Forever.

Nakafa is still far from finished. If something is missing, tell me. I read it.

Take your time. What matters is that you understand.

Nabil

Founder of Nakafa

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Your study mates come from here

Technische Universität München

OTH Regensburg

Institut Teknologi Bandung

Universitas Indonesia

Universitas Gadjah Mada

Universitas Airlangga

Universitas Padjadjaran

Universitas Diponegoro

Universitas Hasanuddin

Universitas Brawijaya

Universitas Sebelas Maret

Universitas Pendidikan Indonesia

Nurul Fikri Boarding School Bogor

IPB University

Universitas Sumatera Utara

Universitas Andalas

Universitas Udayana

Universitas Negeri Yogyakarta

Universitas Sriwijaya

Telkom University

Your school?

Frequently asked

From primary school to university: Mathematics, Physics, Chemistry, Biology, Computer Science and more.

Learn until it clicks.

Lessons that are easy to read

Practice tests that score you right away

Nina knows which part you mean

13 comes from taking m as 3

Check it against what you know

What is hard to picture, you can see

Nina gets to know you

Private from the start

Your curriculum may differ. The way you learn stays the same.

Your study mates come from here

Free really means free

Free

Pro

Nakafa is for a whole school too

Frequently asked

Which subjects and grades are covered?

Can I learn without an account?

Does it work on a phone?

Which languages is Nakafa in?

Is Nina always right?

What are AI credits?

What happens when my credits run out?

Where do I manage what Nina remembers?

Is your data still yours?

How does Nakafa keep its content accurate?

Learning together is better

Want to understandquadratic functions today?something today?

Learn until it clicks.

Lessons that are easy to read

Practice tests that score you right away

Nina knows which part you mean

13 comes from taking m as 3

Check it against what you know

What is hard to picture, you can see

Nina gets to know you

Private from the start

Your curriculum may differ. The way you learn stays the same.

Your study mates come from here

Free really means free

Free

Pro

Nakafa is for a whole school too

Frequently asked

Which subjects and grades are covered?

Can I learn without an account?

Does it work on a phone?

Which languages is Nakafa in?

Is Nina always right?

What are AI credits?

What happens when my credits run out?

Where do I manage what Nina remembers?

Is your data still yours?

How does Nakafa keep its content accurate?

Learning together is better

Want to understandquadratic functions today?something today?

Want to understandsomething today?

Want to understandsomething today?