What are all the formulas in physics?

Variation formula of physical quantity (unit): speed V(m/S) v= S: distance /t: time.

Gravity G (N) G=mg m: mass.

G: 9.8n/kg or 10N/kg.

Density ρ (kg/m3) ρ = m/v.

Electric field force F=Eq (E: field strength N/C, q: electric quantity c, and the electric field force on the positive charge is in the same direction as the field strength).

Ampere force F=BILsinθ (θ is the angle between b and l, F=BIL when L⊥B and F=0 when B//L).

Lorentz force f=qVBin θ (θ is the angle between b and v, when V⊥B: f = qvb, when V//B: f=0).

Common strength:

1. gravity G=mg (vertically downward, g=9.8N/Kg≈ 10N/Kg, acting at the center of gravity, applicable to the vicinity of the earth's surface).

2. Hooke's law F = kx {the direction is along the recovery deformation direction, k: stiffness coefficient (N/m), x: deformation variable (m)}.

3. Sliding friction force F =μN {opposite to the relative motion direction of the object, μ: friction coefficient, n: positive pressure (N)}.

4. The static friction is 0≤f, and the static friction is ≤fm (contrary to the relative motion trend of objects, fm is the maximum static friction).

5. Gravitation F=Gm 1m2/r square (g = 6.67×10-11nmm square /kg square, the direction is on their connecting line).

6. electrostatic force f = kq1q 2/r 2 (k = 9.0×109n m square /C square, the direction is on their connecting line).