Mass and weight — practice question

A body has a weight of $19\,\text{N}$ on a planet where the acceleration of free fall is $3.8\,\text{m s}^{-2}$. What is the object's mass?

• A$0.20\,\text{kg}$
• B$1.9\,\text{kg}$
• C$5.0\,\text{kg}$
• D$72\,\text{kg}$