Newtonian dynamics: first, second and third laws, inertial and non-inertial reference frames, conservation laws, forces and potentials, gravitational field, central forces, small oscillations.
牛顿力学：牛顿第一、二、三定律，惯性和非惯性参考系，牛顿守恒定律，力和潜能，重力场，向心力，低频振荡。
And it's important conceptually because a lot of the forces are gradients of potentials, namely, gravitational force, electric force.
这在概念上很重要，因为很多力都是势场的梯度，比如重力场，电场。
The potentials on the free surface, the time histories of wave elevations and wave forces on the body are calculated.
计算了自由面的速度势、自由表面波高时间历程和物体受到的波浪力。
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