🔧 dynamics工具

💥 一维动量守恒m₁v₁ + m₂v₂ = (m₁+m₂)·v′ 💥 做功W = F·d·cosθ 💥 冲量J = F·Δt = Δp 💥 力矩τ = r·F·sinθ 💥 功率P = F·v 💥 动摩擦力F_k = μ_k·N 💥 动能KE = ½·m·v² 💥 动量p = m·v 💥 弹簧势能U = ½·k·x² 💥 斜面加速度a = g·(sinθ − μ·cosθ) 💥 最大静摩擦力F_{s,max} = μ_s·N 💥 牛顿第二定律F = m·a 💥 重力W = m·g 💥 重力势能PE = m·g·h