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CAIE IGCSE Physics 1.3.3 Gravitational field strength as force

Practise using gravitational field strength as force per unit mass, including W = mg calculations and Earth-Moon comparison tables.

Syllabus
2026–2028
Course
Physics 0625

Exam points

  • calculate W, m or g from W = mg, keeping N, kg and N kg^-1 consistent
  • compare mass and weight when an object moves between Earth, Moon or orbit
  • recognise g as force per unit mass and equivalent to acceleration of free fall

1.3.3—Gravitational field strength as force question 1

[Maximum number: 2]

All the sides of a plastic cube are 8.0 cm long. Fig. 3.1 shows the cube.

Fig. 3.1 (not to scale)

Fig. 3.1 (not to scale)

The mass of the cube is 0.44 kg .

On the Moon, the weight of the cube is 0.70 N .

Calculate the gravitational field strength on the Moon.
gravitational field strength =

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