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Gravitational field strength measures the gravitational force per unit mass at a location. It's fundamental to understanding celestial mechanics and tidal forces.
Công thức
The calculator applies g = GM / r²
- GM
- GM value — Variable used in the calculation
- g
- GM / r² — GM / r²
Hướng dẫn từng bước
- 1Enter the source mass and distance from its center
- 2The calculator applies g = GM / r²
- 3Results show gravitational field strength
Ví dụ có lời giải
đầu vào
M = 5.972 × 10²⁴ kg (Earth), r = 6.378 × 10⁶ m (surface)
Kết quả
g ≈ 9.81 m/s²
Standard gravity at sea level
Lỗi thường gặp cần tránh
- ✕Using altitude above surface instead of distance from center
- ✕Confusing gravitational field with gravitational potential
Câu hỏi thường gặp
Does gravitational field strength vary with mass of test object?
No, it's independent of test mass. A feather and hammer experience the same field.
Why does gravity follow an inverse square law?
Gravity spreads from a point source in three dimensions; field strength decreases as area increases (4πr²).
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