PHYSICAL QUANTITY

Strength: formulas and units of measurement

Strength: symbol F, unit N. Formulas and explanations for Mechanics, Magnetism.

F

\text{N}

newton

KEY CONNECTIONS

Formulas

F = m a

F = ma

F_{elastic} = k ∣ Δ l ∣

Fupr = k|Δl|

F_{fr} = μ N

Ftr = μN

F_{fr} = μ m g cos α

Ftr = μmg cos α

F = m g

F = mg

F = G \frac{m _{1} m _{2}}{r ^{2}}

F = Gm₁m₂ / r²

F_{A} = I l B sin α

Fₐ = IlB sin α

F_{L} = q v B sin α

Fl = qvB sin α

NOTATION

Quantities in formulas

$F$: Force is a measure of the interaction of bodies that changes their movement or shape.
$m$: Mass is a scalar physical quantity that is a measure of the inertia of a body.
$a$: Acceleration is the rate of change in the speed of a body.
$F_{\text{elastic}}$: Elastic force is a force that occurs when a body deforms.
$k$: The stiffness of a spring is a characteristic of its resistance to deformation.
$\Delta l$: Elongation is a change in the length of a body during deformation.
$F_{\text{fr}}$: Friction force is a force that prevents the relative movement of surfaces.
$\mu$: Friction coefficient is a characteristic of the resistance to movement of contacting surfaces.
$N$: The support reaction force (normal pressure force) is the force with which the support acts on the body perpendicular to the surface.
$g$: Gravity acceleration is the acceleration of a body under the influence of gravity without taking into account the resistance of the medium.
$\alpha$: Angle is a quantity characterizing the mutual rotation of directions.
$G$: Gravitational constant is a coefficient characterizing the force of universal gravity.
$m_1$: The mass of the first body is a measure of the inertia of the first body under consideration.
$m_2$: The mass of the second body is a measure of the inertia of the second body under consideration.
$r$: Distance - the length of the space between selected points.
$F_A$: Ampere force is the force of a magnetic field on a current-carrying conductor.
$I$: Current strength is the charge passing through the cross section of a conductor per unit time.
$l$: Conductor length is the length of the conductor section under consideration.
$B$: Magnetic induction is a force characteristic of a magnetic field.
$F_{\text{L}}$: The Lorentz force is a force acting on a moving charge in a magnetic field.
$q$: Electric charge is a quantity that determines the participation of a body in electrical interaction.
$v$: Speed is the speed and direction of change in body position.

THEORY

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Newton's laws10 class · 20 min

PRACTICE

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