作业帮following statements are written in English1.The normal force and the gravitational force are not an action-reaction pair.2.For an object traveling in circular motion ,the centripetal force never doeswork【向心力不做功?是这个意思吗?为
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/11 03:20:44
following statements are written in English1.The normal force and the gravitational force are not an action-reaction pair.2.For an object traveling in circular motion ,the centripetal force never doeswork【向心力不做功?是这个意思吗?为
following statements are written in English
1.
The normal force and the gravitational force are not an action-reaction pair.
2.
For an object traveling in circular motion ,the centripetal force never does
work
【向心力不做功?是这个意思吗?为什么?】
3.
Momentum is conserved in all collision.Kinetic energy is conserved only in
elastic collisions.
未完待续……我现在只是想求活物理字典一枚……
following statements are written in English1.The normal force and the gravitational force are not an action-reaction pair.2.For an object traveling in circular motion ,the centripetal force never doeswork【向心力不做功?是这个意思吗?为
1、弹力和重力不是一对作用力与反作用力.
2、一个做圆周运动的物体,受到的向心力不做功.（因为向心力的方向始终指向圆心,在每个很短的时间间隔内与物体位移的方向始终垂直,因此,向心力不做功）
3、在所有的碰撞中动量是守恒的,只有在弹性碰撞中动能才守恒.
1、支持力和重力不是一对作用力与反作用力。
2、圆周运动的物体，向心力不做功
3、在所有的碰撞中，动量守恒；而动能只在弹性碰撞中守恒。