If the body moves a displacement d s in a time dt, F 110 Unit of power: joule/second ( Watt) See动画库/力学夹/2-03变力的 功A.exe1 ch 11 Energy I: Work and kinetic energyCh.11 Energy I: Work and kinetic energy (11-10) Unit of power: joule/second (Watt) dW F d s d s P F F v dt dt dt → → →  → → → = = =  =  If the body moves a displacement in a time dt, → d s See 动画库/力学夹/2-03变力的 功A.exe 1