【摘 要】
：
描述物体运动状态的物理量如位移、速度、加速度等都具有一定的相对性,其原因是上述各物理量必须相对于某一参考系才具有实际意义.对同一物体而言若选择不同物体为参考系上述
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描述物体运动状态的物理量如位移、速度、加速度等都具有一定的相对性,其原因是上述各物理量必须相对于某一参考系才具有实际意义.对同一物体而言若选择不同物体为参考系上述各物理量可以不同,在解决直线运动类问题时大多数同学习惯选择地面或相对地面静止的物体
Physical quantities that describe the state of motion of an object such as displacement, velocity, acceleration, etc., have a certain relative relativity because each of the above-mentioned physical quantities must have a real meaning relative to a certain reference frame. If different objects are selected as the reference system for the same object The above physical quantities can be different, in solving the problem of linear motion most students habitually choose the ground or relative to the ground stationary objects
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