如何计算Rotational K E
learn.whatIsHeading
Rotational kinetic energy is the energy of spinning objects. It depends on both moment of inertia and angular velocity, analogous to translational kinetic energy.
公式
The calculator applies KE_rot = ½ × I × ω²
- I
- I value — Variable used in the calculation
分步指南
- 1Enter the moment of inertia (I) and angular velocity (ω)
- 2The calculator applies KE_rot = ½ × I × ω²
- 3Results show rotational energy in joules
例题解析
输入
I = 2 kg·m², ω = 10 rad/s
结果
KE_rot = 100 J
Compare to ½mv²
常见错误注意事项
- ✕Using linear mass instead of moment of inertia in the formula
- ✕Forgetting to square the angular velocity
常见问题
How does moment of inertia relate to mass distribution?
Objects with mass concentrated far from the rotation axis have higher moment of inertia and require more energy to spin.
Can kinetic energy be converted between rotational and translational?
Yes, rolling objects convert between both types; the total kinetic energy is the sum of both components.
准备好计算了吗？尝试免费的 Rotational K E 计算器
自己尝试一下 →