✽
The Essence
of
Physics
Vol. I
✺
F = ma
E = mc²
F = G(m₁m₂)/r²
∇ × E = −∂B/∂t
p = mv
λ = h/p
S = k ln Ω
Wave Equation:
∂²u/∂t² = c²∇²u
c = speed of propagation
Laws of Thermodynamics
ΔU = Q − W
dS ≥ δQ / T
PV = nRT
Schrödinger:
iℏ ∂ψ/∂t = Ĥψ
Uncertainty:
Δx · Δp ≥ ℏ/2
Maxwell's Equations:
∇ · E = ρ/ε₀
∇ · B = 0
∇ × E = −∂B/∂t
∇ × B = μ₀J + μ₀ε₀∂E/∂t
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Contents
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Lesson 1.0 — Newton’s Laws
Lesson 1.1 — Velocity
Lesson 1.2 — Acceleration
F=ma
▼
▼
I
Law of Inertia
A body at rest stays at rest, and a body in motion stays in motion, unless acted upon by an external force.
ΣF = 0
II
Law of Acceleration
The acceleration of an object is proportional to the net force and inversely proportional to its mass.
F = ma
F
Force
=
m
Mass
a
Acceleration
F
Net Force
The total push or pull acting on an object
Measured in Newtons (N)
m
Mass
The amount of matter in an object; its resistance to acceleration
Measured in kilograms (kg)
a
Acceleration
The rate of change of velocity over time
Measured in m/s²
III
Law of Action & Reaction
For every action, there is an equal and opposite reaction.
F₁₂ = −F₂₁
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Lesson 1.1 — Velocity
0
Δx =
+
0.0
+
v
Δ
x
=
v
t
Lesson 1.2 — Acceleration
0
Δ
x
=
+
0.0
m
v
=
+
0.0
m/s
a
=
+
0.00
m/s²
Δ
x
=
+
0.0
m
v
=
+
0.0
m/s
a
=
+
0.00
m/s²
|
a
| = 1 m/s²
|
a
| = 2 m/s²
|
a
| = 3 m/s²
▼
v
=
a
t
Practice — Lesson 1.1
Reference
Δ
x
=
v
t
Problem 1 of 6
Free Response
Submit
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