[单选题]
An object of mass m sits on a flat gxd6/xpj5axw0:xb -h table. The Earth pulls on thiskdx 3zb0k.s1yqc (9pm object with force mg, whs.1mzpq k(930cb y xdkich we will call the action force. What is the reaction force?
A. The table pushing up on the object with force mg.
B. The object pushing down on the table with force mg.
C. The table pushing down on the floor with force mg.
D. The object pulling upward on the Earth with force mg.
参考答案: D
本题详细解析:
暂无
| 
