| 1. | A force of 24kn is applied at b .
有24KN的力作用在B点。 |
| 2. | Weathering of rock is essentially a static process .
岩石的风化作用基本上是一种静力作用。 |
| 3. | The upper surface of the fluid is under atmospheric pressure .
流体上表面受大气压力作用。 |
| 4. | The result of this shearing force is to push the endoplasm forward .
这种剪切力作用的结果是推动内质向前。 |
| 5. | Transverse forces acting in the positive co-ordinate direction are positive .
横力作用在正坐标方向的为正。 |
| 6. | Mechanics is the study of the motion of collections of rigid bodies under given forces .
力学是研究刚体集合在力作用下的运动。 |
| 7. | The interaction between two surfaces is the result of repulsion and attraction forces .
两个表面间的相互作用是由于吸引力和排斥力作用的结果。 |
| 8. | We conclude this section with two examples of motion under the action of a variable force .
下面我们举两个关于物体在变力作用下运动的例子来结束这一节。 |
| 9. | The motion of a body when acted upon by a constant force was considered in detail in chapter 4 and 5 .
在第四、五两章详细讨论了物体在恒力作用下的运动。 |
| 10. | The direction of each force is perpendicular to a line drawn from the axis to the point of application of the force .
每个力都垂直于从轴到力作用点的引线。 |
