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Force is measured in newtons (SI), pound-force (lbf), kilogram-force (kgf/kilopond), and dynes. Force = mass × acceleration (Newton's second law). 1 newton is the force that accelerates 1 kg at 1 m/s².

Hướng dẫn từng bước

1. 11 newton (N) = 1 kg·m/s²
2. 21 pound-force (lbf) = 4.44822 N
3. 31 kilogram-force (kgf) = 9.80665 N (weight of 1 kg at standard gravity)
4. 41 dyne = 10⁻⁵ N (CGS unit)

Ví dụ có lời giải