A car of mass 500 kg is moving at a speed of 20 m/s. What is its kinetic energy? A. 100000 J B. 10000 J C. 20000 J D. 50000 J 相关知识点: 试题来源: 解析 A。动能的计算公式为 Ek = 1/2mv²,代入数据可得 Ek = 1/2×500×20² = 100000 J。选项 B 计算错误,选项 C...
A car of mass 1000 kg is moving at a speed of 20 m/s. What is its kinetic energy? A. 200,000 J B. 400,000 J C. 100,000 J D. 50,000 J 相关知识点: 试题来源: 解析 A。动能的计算公式为 Ek = 1/2 mv²,其中 m 是质量,v 是速度。代入数值,Ek = 1/2 × 1000 × 20...
What is kinetic energy? Mechanical Energy Mechanical energy is the energy possessed by an object by virtue of its mechanics. The mechanical energy is of two types Kinetic Energy Potential Energy Potential energy can be of further many types. Answer and Explanation: 1 Become a Study.com memb...
简谐运动（Simple harmonic motion）（SHM）（直译简单和谐运动）是最基本也最简单的机械振动。当某物体进行简谐运动时，物体所受的力跟位移成正比，并且总是指向平衡位置。它是一种由自身系统性质决定的周期性运动。（如单摆运动和弹簧振子运动）实际上简谐振动就是正弦振动。故此在无线电学中简谐信号实际上...
2 (a) State what is meant by kinetic energy.相关知识点: 试题来源: 解析 动能是物体由于其运动而具有的能量。物体运动得越快,其动能就越大。例如,一辆快速行驶的汽车比一辆缓慢行驶的汽车具有更大的动能。 问题要求解释动能的含义。参考答案“动能是物体由于其运动而具有的能量”简洁明了地回答了这个问题,是...
The kinetic. Energy. A. Energy Definition The ability to do work. Kinetic energy. Equations The kinetic energy of a moving object is one half of the product of its mass multiplied by the square of its velocity. or. Potential and Kinetic Energy Energy: is the ability to do work. ...
The Definition of Kinetic Energy Kinetic energy is theenergyan object possesses due to its motion. An object ofmassm moving at velocity v has a kinetic energy equal to ½mv2. Example An example ofkinetic energyis a swinging pendulum.
Is Kinetic energy the same thing as Potential energy? I know that a shotgun blast has kinetic energy as a group that is more powerful than a single bullet, but does the same hold true for something like a flock of birds too? Or are the birds always counted as individuals?
Incident energy is energy that falls on or strikes something and then transfers some or all of its power into the object. In most...
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