centripetal force

简明释义

向心力

英英释义

例句

1.When spinning a ball on a string, the tension in the string provides the centripetal force (向心力) needed to keep the ball moving in a circle.

当用绳子旋转一个球时，绳子的张力提供了保持球沿圆周运动所需的向心力。

2.Astronauts experience a sensation of weightlessness when the centripetal force (向心力) is not enough to counteract gravity in orbit.

宇航员在轨道上体验到失重感，当向心力不足以抵消重力时。

3.The centripetal force (向心力) acting on the planets keeps them in stable orbits around the sun.

作用于行星的向心力使它们在太阳周围保持稳定的轨道。

4.In a roller coaster ride, the centripetal force (向心力) keeps the riders securely in their seats during loops.

在过山车上，向心力确保乘客在过环时安全地坐在座位上。

5.The car made a sharp turn, and the driver felt the effects of centripetal force (向心力) pulling him towards the center of the curve.

汽车急转弯，司机感受到向心力将他拉向弯道的中心。

作文

The concept of centripetal force is fundamental in understanding the motion of objects in circular paths. In physics, centripetal force refers to the force that acts on an object moving in a circular trajectory, directed towards the center of the circle around which the object is moving. This force is essential for maintaining the circular motion and preventing the object from flying off in a straight line due to inertia.To grasp the importance of centripetal force, let's consider a common example: a car turning around a curve. As the car navigates the bend, the tires exert a force against the road, which provides the necessary centripetal force to keep the vehicle on its curved path. Without this force, the car would not be able to maintain its circular trajectory and would instead move off in a straight line, potentially leading to a loss of control and an accident.Moreover, centripetal force is not just limited to vehicles; it is also present in various natural phenomena. For instance, the Earth orbits around the Sun due to the gravitational pull exerted by the Sun, which acts as a centripetal force. This gravitational force keeps the planets in their respective orbits, preventing them from drifting away into space. Similarly, satellites orbiting the Earth are held in place by the centripetal force provided by Earth's gravity, allowing them to perform their functions, such as communication and weather monitoring.The formula for calculating centripetal force is given by F = (mv²)/r, where F represents the centripetal force, m is the mass of the object, v is the velocity of the object, and r is the radius of the circular path. This equation illustrates that the centripetal force increases with the square of the velocity, meaning that as an object's speed increases, the required centripetal force to maintain its circular motion also increases. This relationship is crucial for engineers and designers when creating safe roads, amusement park rides, and other structures that involve circular motion.In conclusion, understanding centripetal force is vital for comprehending various aspects of motion in our daily lives and the universe. Whether it is a car navigating a curve, a planet orbiting a star, or a satellite circling the Earth, centripetal force plays a pivotal role in ensuring that these objects remain in their respective paths. By recognizing the significance of this force, we can better appreciate the intricate dynamics at play in both engineered systems and natural phenomena. As we continue to explore the laws of physics, the concept of centripetal force will undoubtedly remain a key element in our understanding of motion and stability.

“向心力”这一概念对于理解物体在圆形路径中的运动至关重要。在物理学中，centripetal force（向心力）指的是作用于沿圆形轨迹运动的物体的力，该力指向物体所运动圆圈的中心。这种力量对于维持圆周运动和防止物体因惯性而飞出直线至关重要。为了更好地理解centripetal force的重要性，让我们考虑一个常见的例子：汽车在转弯时。当汽车绕弯行驶时，轮胎对路面施加的力量提供了必要的centripetal force，使车辆保持在曲线路径上。如果没有这种力量，汽车将无法维持其圆形轨迹，而是会以直线行驶，这可能导致失控和事故。此外，centripetal force不仅限于车辆，它也存在于各种自然现象中。例如，地球围绕太阳的运动是由于太阳施加的引力，这种引力充当了centripetal force。这种引力使得行星保持在各自的轨道上，防止它们漂离太空。类似地，环绕地球运行的卫星被地球的引力提供的centripetal force所维持，从而能够执行其通信和天气监测等功能。计算centripetal force的公式为F = (mv²)/r，其中F代表centripetal force，m是物体的质量，v是物体的速度，r是圆形路径的半径。这个方程式表明，centripetal force随着速度的平方而增加，这意味着当物体的速度增加时，维持其圆周运动所需的centripetal force也会增加。这种关系对于工程师和设计师在创建安全的道路、游乐园设施和其他涉及圆周运动的结构时至关重要。总之，理解centripetal force对于理解我们日常生活和宇宙中的各种运动方面至关重要。无论是汽车在弯道上的行驶、行星绕恒星的运动，还是卫星环绕地球的轨道，centripetal force在确保这些物体保持各自路径中发挥着关键作用。通过认识到这种力量的重要性，我们可以更好地欣赏在工程系统和自然现象中所发生的复杂动态。随着我们继续探索物理定律，centripetal force的概念无疑将在我们理解运动和稳定性方面保持关键地位。