题目
物理的几个英文定律和题目 求翻译
定律1.the direction of velocity in curvilinear motion is changing with time and the direction of the velocity of a particle at a certain point(or instsnt)is in the tangent direction of the curve at that point.
2. when the direction of the net force a body experiences and the direction of the velocity of the body do not fall in the same straight line, the body is in curvilinear motion.
题目1. if a boat's speed in the still water is 5m/s, and the speed of the water in a river is 3m/s. how can we cross the river in the shortest time? and how about the shortest distance?
定律1.the direction of velocity in curvilinear motion is changing with time and the direction of the velocity of a particle at a certain point(or instsnt)is in the tangent direction of the curve at that point.
2. when the direction of the net force a body experiences and the direction of the velocity of the body do not fall in the same straight line, the body is in curvilinear motion.
题目1. if a boat's speed in the still water is 5m/s, and the speed of the water in a river is 3m/s. how can we cross the river in the shortest time? and how about the shortest distance?
提问时间：2020-11-04
答案
1.曲线运动中速度的方向是随时间变化的方向和速度的粒子在某个点（或instsnt）在切线方向的曲线在这一点上.2.当方向的净力的身体经验的方向和速度的身体不在同一直线上,身体曲线运动.题目：1.如果船的速度在水仍然是...
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