The gravitational field strength, ggg, is commonly expressed with the unit N/kg\text{N/kg}N/kg.
Because g g\,g is also the acceleration of an object in free fall (acceleration due to gravity), it can be written using an alternative unit.
Which of these is also a unit for ggg?
m/s\text{m/s}m/s
m/s2\text{m/s}^2m/s2
kg⋅m/s\text{kg}\cdot\text{m/s}kg⋅m/s
N/m\text{N/m}N/m