牛顿第一定律
Newton's first law An object at rest stays at rest, and an object in motion stays in motion with constant velocity, unless acted upon by a net external force.
CSCA 物理 考试术语
Newton's first law An object at rest stays at rest, and an object in motion stays in motion with constant velocity, unless acted upon by a net external force.
CSCA 物理 考试术语