Units (Forces and Motion)
2 marks · NormalGive 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.