View a Free Body Diagram of all the forces (including gravitational and normal forces).

看所有力的自由体受力图(包括重力和正向力)。

youdao

Protracting object's free-body diagram is a course of analysising object's force from other object.

画受力图是解决力学问题关键的一步。

youdao

Protracting object's free-body diagram is a course of analysising object's force from other object in fact.

绘制物体受力图的过程就是对物体进行受力分析的过程，学会画受力图是解决力学问题关键的一步。

youdao

Protracting object's free-body diagram is a course of analysising object's force from other object in fact.

绘制物体受力图的过程就是对物体进行受力分析的过程，学会画受力图是解决力学问题关键的一步。

youdao