gravitational field intensity

Question

The gravitational field intensity at a point is 5 N/kg. What force will a 2 kg mass experience at that point?

RankGuru · Accepted Answer

1. **Intensity Definition**: Field intensity ($E$) is the force per unit test mass ($m$) at a point.
   - Formula: $E = \frac{F}{m}$.
2. **Invert Formula**: Force $F = m 	imes E$.
3. **Calculation**:
   - $F = 2 	ext{ kg} 	imes 5 	ext{ N/kg} = 10 	ext{ N}$.
4. **Identity**: At the surface of Earth, gravitational intensity is numerically equal to acceleration due to gravity ($g \approx 9.8$ m/s$^2$).

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gravitational field intensity

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