What are the units of linear momentum? A 0.300 kg ball has a speed of 15.0 m/sec. What is its kinetic energy? If the speed were doubled, what would be its kinetic energy? What is its rotational kinetic energy? What instrument is used to measure the average kinetic energy in a substan...
the square of the velocity of the object D. the product of the mass and the velocity of the object 相关知识点: 试题来源: 解析 C。动能“kinetic energy”与物体速度的平方成正比。动能公式为 E=1/2mv²。选项 A 仅质量不行;选项 B 速度不对;选项 D 不是质量和速度的乘积。反馈 收藏 ...
Kinetic energy is the production of energy by an object in motion. There are three subcategories of kinetic energy, including vibrational, which is caused by objects vibrating; rotational, which is caused by moving objects; and translational, which is caused by objects hitting one another. These ...
What is potential energy? When deriving the energy value in this manner, what are the units of energy? What is an example of a material that transfers heat by convection? How does this process work? What is the change in internal energy for a system that releases 154 J of heat and does...
Definition/Summary Kinetic energy (KE) is energy associated with movement as a whole (linear or rotational or both). Kinetic energy of a body...
百度试题 结果1 题目SAT上的题目What fraction of the total energy is in the form of kinetic energy when the block is at position x=1/2A?when后面的理解.就是when前面的要怎么理解.相关知识点: 试题来源: 解析 求那个位置时候,物体的动能占其总能量的 反馈 收藏 ...
What does “m” represent? A. kinetic energy B. velocity C. mass D. acceleration 相关知识点: 试题来源: 解析 C。本题考查物理公式中符号的含义。在公式 KE = 1/2mv²中,m 代表质量(mass)。A 选项 kinetic energy 是动能;B 选项 velocity 是速度;D 选项 acceleration 是加速度。
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...
Simply put, energy is the ability to do work, which is a physics term to describe moving objects with some force across some distance. There are several different forms of energy, and it can be transformed from one form to another.
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...