A museum conservator is preparing to weigh a bronze bell. A balance shows that the bell has a mass of 0.60 kg. The bell is suspended from a newtonmeter, which reads 6.4 N when the bell is stationary. The gravitational field strength is 10 N kg−110\ \mathrm{N\,kg^{-1}}10 Nkg−1.
What did the newtonmeter read with no bell attached?
6.0 N6.0\ \mathrm{N}6.0 N
−0.4 N-0.4\ \mathrm{N}−0.4 N
0.0 N0.0\ \mathrm{N}0.0 N
0.4 N0.4\ \mathrm{N}0.4 N