Fizik Bala

Learn physics by experiment: calculate, test, see

48 experiments with Professor Aigul: throw a stone, build a circuit, focus an image with a lens, watch atoms decay. You calculate with the formula — and the simulation runs with exactly your number.

48 experiments6 chaptersGrades 7–11 · olympiad6 languages
Start
Live experiment1.5 · Throwing at an angle
vg
L = v₀² · sin 2α / gRange and height
1
Read

Professor Aigul shows the effect and sets a task.

2
Calculate

Put the numbers into the formula — a calculator is built in.

3
Test

The simulation runs with your answer: does it hit the target?

4
Play

In the lab, change the parameters and explore.

Map of experiments

Each chapter opens on its own. Inside a chapter, earn a ⭐ to unlock the next experiment.

v
v
Chapter 1
Grades 7–9

Motion

Speedaccelerationfree fallprojectilescircular motiongraphs
0 of 8 experiments done⭐ 0/24
Start the chapter
1.1
Speed
v = s / t
Next
1.2
Acceleration
a = (v − v₀) / t
1.3
Free fall
h = g·t² / 2
1.4
Horizontal throw
t = √(2h / g)
1.5
Throwing at an angle
L = v₀² · sin 2α / g
1.6
Meeting and catching up
t = s / (v₁ + v₂)
1.7
Circular motion
v = 2πr / T
1.8
Motion graphs
s = S (v–t)
F
F
Chapter 2
Grades 7–10

Force and energy

Newton's lawsfrictionspringsleverswork and powerenergymomentumgravity
0 of 8 experiments done⭐ 0/24
Start the chapter
2.1
Newton’s second law
F = m · a
2.2
Friction
F = μ · m · g
2.3
Hooke’s law
F = k · x
2.4
Lever
F₁ · l₁ = F₂ · l₂
2.5
Work and power
A = F · s = m·g·h
2.6
Conservation of energy
Eₚ = m·g·h
2.7
Momentum
p = m · v
2.8
Universal gravitation
F = G·M·m / r²
Q
Q
Chapter 3
Grades 7–10

Matter and heat

DensitypressureArchimedeshydraulicsheatchanges of stategas laws
0 of 8 experiments done⭐ 0/24
Start the chapter
3.1
Density
ρ = m / V
3.2
Pressure
p = F / S
3.3
Buoyancy
F_A = ρ₀ · g · V
3.4
Hydraulic press
F₁ / S₁ = F₂ / S₂
3.5
Quantity of heat
Q = c · m · Δt
3.6
Heat balance
Q₁ = Q₂
3.7
Melting and boiling
Q = λ · m
3.8
Gas laws
p₁V₁ / T₁ = p₂V₂ / T₂
I
I
Chapter 4
Grades 8, 10–11

Electricity and magnetism

CoulombOhm's lawseries and parallelpowerLorentz forceinductiontransformers
0 of 8 experiments done⭐ 0/24
Start the chapter
4.1
Coulomb’s law
F = k·|q₁|·|q₂| / r²
4.2
Ohm’s law
I = U / R
4.3
Series circuits
R = R₁ + R₂
4.4
Parallel circuits
1/R = 1/R₁ + 1/R₂
4.5
Power and energy
P = U·I
4.6
Lorentz force
F = q·v·B
4.7
Electromagnetic induction
ε = B·l·v
4.8
Transformer
U₁ / U₂ = N₁ / N₂
λ
λ
Chapter 5
Grades 9, 11 · university

Waves, light and atoms

Pendulumswavesreflectionrefractionlensesphotoelectric effectradioactivityrelativity
0 of 8 experiments done⭐ 0/24
Start the chapter
5.1
Pendulum
T = 2π√(l / g)
5.2
Waves
v = λ · ν
5.3
Reflection of light
α = β
5.4
Refraction of light
n₁ · sin α = n₂ · sin β
5.5
Lenses
1/F = 1/d + 1/f
5.6
Photons and the photoelectric effect
E = h · ν
5.7
Radioactive decay
N = N₀ · 2^(−t/T)
5.8
Relativity
E = m · c²
★
★
Chapter 6
Grades 9–11 · olympiad

Olympiad: research

Colliding ballsrestitutionlasersdimensionsinductiondata tables and graphs
0 of 8 experiments done⭐ 0/24
Start the chapter
6.1
Colliding balls
v = 2√(gℓ)·sin(α/2)
6.2
Coefficient of restitution
k = v′ / v = √(h₁ / h₀)
6.3
Laser beam
D₀ = f·θ
6.4
Dimensions: a formula without the law
[ρ] = kg·m⁻³
6.5
The underwater guard loop
ε = (ΔB/Δt)·πr²
6.6
Measuring g with a pendulum
T = 2π·√(l / g)
6.7
The battery’s secret
R = U / I
6.8
How tea cools down
T − T₀ = (T₁ − T₀)·2^(−t/τ)

Your first experiment takes a minute

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1.1 · Speed