- 搜标题
- 搜题干
- 搜选项
单项选择题
An object with a weight of P=100N is placed on a horizontal surface, as shown in the figure, the friction factor in between is fs=0.2, and the object is stationary under the action of horizontal force F=10N, the friction force is ________.
An object with a weight of P=100N is placed on a horizontal surface, as shown in the figure, the friction factor in between is fs=0.2, and the object is stationary under the action of horizontal force F=10N, the friction force is ________.
A、20N
B、10N
C、2N
D、-10N
