resultant force

简明释义

合力

英英释义

例句

1.When two people push a car in the same direction, the resultant force 合力 acting on the car increases.

当两个人朝同一方向推一辆车时，作用在车上的resultant force 合力 增加了。

2.In a game of tug-of-war, the team that generates the greatest resultant force 合力 will win.

在拔河比赛中，产生最大resultant force 合力 的团队将获胜。

3.The engineer calculated the resultant force 合力 on the bridge to ensure it could support the weight of vehicles.

工程师计算了桥上的resultant force 合力，以确保它能够承受车辆的重量。

4.To find the resultant force 合力, you must add all the individual forces acting on an object.

要找到resultant force 合力，你必须将作用在物体上的所有个别力量相加。

5.If one force pulls to the right and another pulls to the left with equal strength, the resultant force 合力 is zero.

如果一个力向右拉，另一个力向左拉且力量相等，则resultant force 合力 为零。

作文

Understanding the concept of resultant force is essential in the study of physics, particularly in mechanics. The term resultant force refers to the single force that represents the vector sum of all the individual forces acting on an object. In simpler terms, it is the net force that determines the motion of an object. To grasp this concept more effectively, we can explore its implications through various real-life scenarios and examples.Consider a situation where two people are pushing a car from opposite sides. One person exerts a force of 200 Newtons to the right, while the other pushes with a force of 150 Newtons to the left. To determine the resultant force, we need to consider the direction of each force. Since one force is directed to the right and the other to the left, we subtract the smaller force from the larger one. Thus, the resultant force is 200 N - 150 N = 50 N to the right. This means that the car will accelerate to the right due to the net force acting on it.Another example can be taken from sports, particularly in football. When a player kicks a ball, multiple forces come into play, such as the force exerted by the player's foot, the gravitational force pulling the ball downwards, and the air resistance acting against the ball's motion. The resultant force in this scenario is crucial as it determines the trajectory and speed of the ball. If the kicking force is strong enough to overcome the gravitational pull and air resistance, the ball will fly towards the goal.In a more complex scenario, consider a box resting on a flat surface with several forces acting upon it: gravity pulling it downward, the normal force pushing it upward, friction opposing its movement, and any applied force trying to move it. Here, the resultant force can be calculated by analyzing all these forces. If the applied force is greater than the frictional force, the box will move in the direction of the applied force. If the forces balance out, the resultant force will be zero, and the box will remain stationary.The significance of understanding resultant force extends beyond academic learning; it plays a vital role in engineering and safety. For instance, engineers must consider the resultant force when designing structures like bridges or buildings. They need to ensure that the structure can withstand various forces, including wind, weight, and seismic activity. A thorough analysis of the resultant force helps in creating safe and reliable designs.In conclusion, the concept of resultant force is fundamental in understanding how forces interact and influence motion. By recognizing the resultant force, we can predict how objects will move under various conditions, which is crucial in both theoretical physics and practical applications. Whether in everyday situations or advanced engineering, the idea of resultant force remains a cornerstone of our understanding of the physical world. Mastering this concept not only enhances our knowledge of physics but also equips us with the skills to analyze and solve real-world problems effectively.

理解合力的概念在物理学，尤其是力学的学习中至关重要。术语合力指的是代表作用于物体上的所有个别力的矢量和的单一力。简单来说，它是决定物体运动的净力。为了更有效地掌握这一概念，我们可以通过各种现实生活中的场景和示例来探讨其含义。考虑这样一种情况：两个人从相反的方向推一辆车。一个人向右施加200牛顿的力，而另一个人向左施加150牛顿的力。要确定合力，我们需要考虑每个力的方向。由于一个力指向右侧，另一个力指向左侧，因此我们将较小的力从较大的力中减去。因此，合力为200 N - 150 N = 50 N，方向向右。这意味着由于作用于它的净力，汽车将向右加速。另一个例子可以从体育运动中找到，尤其是在足球比赛中。当球员踢球时，多个力会发挥作用，例如球员脚施加的力、重力将球向下拉以及空气阻力对球运动的反作用力。在这种情况下，合力至关重要，因为它决定了球的轨迹和速度。如果踢球的力量足以克服重力和空气阻力，球就会飞向球门。在一个更复杂的场景中，考虑一个放在平坦表面上的箱子，受到多个力的作用：重力向下拉，法向力向上推，摩擦力抵抗其运动，以及任何试图移动它的施加力。在这里，可以通过分析所有这些力来计算合力。如果施加的力大于摩擦力，箱子将沿施加力的方向移动。如果这些力相互平衡，合力将为零，箱子将保持静止。理解合力的重要性超越了学术学习；它在工程和安全中发挥着至关重要的作用。例如，工程师在设计桥梁或建筑物时必须考虑合力。他们需要确保结构能够承受各种力，包括风、重量和地震活动。对合力的彻底分析有助于创建安全可靠的设计。总之，合力的概念是理解力如何相互作用和影响运动的基础。通过认识到合力，我们可以预测物体在各种条件下的运动，这在理论物理和实际应用中都至关重要。无论是在日常情况下还是在高级工程中，合力的概念始终是我们理解物理世界的基石。掌握这一概念不仅增强了我们对物理的知识，还使我们具备有效分析和解决现实问题的能力。