A horticulturist records the weight of a potted tree as 196 N. The gravitational field strength is 9.8 N kg−19.8\ \mathrm{N\,kg^{-1}}9.8 Nkg−1. What is the mass of the potted tree?
0.050 kg0.050\ \mathrm{kg}0.050 kg
19.6 kg19.6\ \mathrm{kg}19.6 kg
20 kg20\ \mathrm{kg}20 kg
1920 kg1920\ \mathrm{kg}1920 kg