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Laws of motion & friction formulas
13 formulas for Laws of motion & friction, from the Physics — Formulas section of the Quantix formula library. Tap 🧮 next to a formula to solve it for any variable with step-by-step working.
| Name | Formula | Note |
|---|---|---|
| Newton's second law | F = ma = dp/dt | N |
| Momentum | p = mv 🧮 Solve step by step | kg·m/s |
| Impulse | J = FΔt = Δp 🧮 Solve step by step | N·s |
| Weight | W = mg 🧮 Solve step by step | N |
| Conservation of momentum | m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂ 🧮 Solve step by step | |
| Static friction | f ≤ μₛN | N |
| Kinetic friction | f = μₖN 🧮 Solve step by step | N |
| Angle of repose | tan θ = μₛ 🧮 Solve step by step | |
| Centripetal force | F = mv²/r 🧮 Solve step by step | N |
| Banking of road | tan θ = v²/(rg) 🧮 Solve step by step | no friction |
| Lift — apparent weight | up: m(g + a); down: m(g − a) | N |
| Atwood machine | a = (m₁ − m₂)g/(m₁ + m₂); T = 2m₁m₂g/(m₁ + m₂) 🧮 Solve step by step | |
| Coefficient of restitution | e = (v₂ − v₁)/(u₁ − u₂) 🧮 Solve step by step | elastic e = 1 |
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