物理
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计算器: Car Crash Force.
使用计算器: Car Crash Force，根据输入获得清晰实用的结果。
此计算器尚未完全翻译——部分文本以英文显示。
设备端计算无需注册
01
输入数值
输入时结果会更新。
02 / 答案
averageForceN: 300,000 N
impulseNs: 30,000 N·s
averageAccelerationMps2: -200 m/s²
Results update automatically as you type.
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Cite this calculator
Canonical URL: https://mathify.one/zh/physics/car-crash-force
Cite as: Mathify. (2026). 计算器: Car Crash Force. https://mathify.one/zh/physics/car-crash-force
Use Cases
Physics homework or classroom demo
Students can quickly compute impact force for different masses, speeds, and stopping times to understand Newton's laws.
Example: A 1200 kg car decelerates from 20 m/s to 0 in 0.1 s: force = 240,000 N.
Safety design considerations
Engineers and safety enthusiasts can explore how longer stopping times reduce force, illustrating the role of crumple zones.
Example: Doubling stopping time from 0.1 s to 0.2 s halves the average force.
Frequently Asked Questions
- How is the crash force calculated?
- The calculator uses the impulse-momentum theorem: force equals mass times change in velocity divided by stopping time. You input vehicle mass, initial and final speeds, and stopping time to get the average force in newtons.
- What units should I use?
- Enter mass in kilograms (kg), speeds in meters per second (m/s), and stopping time in seconds (s). The result is the average force in newtons (N).
- Can this calculator predict injury severity?
- No, it only estimates the average force. Actual injury depends on many factors like seatbelt use, airbags, and crash dynamics. Always consult safety professionals for real-world assessments.
Tips & Common Mistakes
Tips
- Ensure speeds are in m/s; convert from km/h by dividing by 3.6.
- Use a realistic stopping time (0.1–0.3 s for a crash) for meaningful estimates.
- If final speed is zero, the change in speed equals the initial speed.
- Remember that this is an average force; peak forces can be higher.
Common Mistakes to Avoid
- Forgetting to convert km/h to m/s, leading to incorrect force values.
- Using stopping distance instead of stopping time; this calculator requires time.
- Assuming the force is constant during the crash; it's an average estimate.
Last updated: August 13, 2026