o Impetus to the study of fluidmechnics (流体力学研究的推动力) 1. Newtons sine-square law 2. Experiments carried out by D'Alembert 3. Euler's description of the flow modelImpetus to the study of fluidmechnics （流体力学研究的推动力） 1. Newton’s sine-square law 2. Experiments carried out by D’Alembert 3. Euler’s description of the flow model