Units (Forces and Motion)

2 marks · Normal

Give the SI unit and symbol for gravitational field strength, and explain briefly what this quantity measures.

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newton per kilogram (N/kg); the force per unit mass

Also accept: newton per kilogram (N/kg); N/kg

Common mistakes: N/m; N

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Marking points

B1 · 1 mark · Correct SI unit and symbol given: newton per kilogram (N/kg).

B2 · 1 mark · Explains that it measures the force per unit mass or the gravitational force acting on 1 kg.

Worked solution

The SI unit for gravitational field strength is newton per kilogram (N/kg). It measures how much force is exerted on each kilogram of mass.