如何计算Work Energy
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The work-energy theorem states that the net work done on an object equals its change in kinetic energy. This fundamental principle connects forces to motion and energy transfer.
公式
The calculator finds work using W = F × d × cos(θ)
- W
- F × d × cos(θ) — F × d × cos(θ)
- F
- F value — Variable used in the calculation
分步指南
- 1Input the force magnitude, displacement distance, and angle between them
- 2The calculator finds work using W = F × d × cos(θ)
- 3Results show work done and the resulting kinetic energy change
例题解析
输入
F = 50 N, d = 10 m, θ = 0°
结果
W = 500 J, ΔKE = 500 J
Force perfectly aligned with motion
常见错误注意事项
- ✕Forgetting to apply the cosine factor for non-aligned forces
- ✕Confusing work with power (work is energy transfer, power is rate)
常见问题
Can work be negative?
Yes, when force opposes motion (angle > 90°), work is negative, removing energy from the system.
What if force is perpendicular to motion?
No work is done because cos(90°) = 0; perpendicular forces change direction but not kinetic energy.
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