Fish are hung on a spring scale to decide their mass (most fishermen feel no obligation to report the mass truthfully).
a) How far apart are the half-kilogram marks on the scale?
b) What is the mass of a fish that stretches the spring 5.50 cm?
c) What is the force constant of the spring in such a scale if it stretches 6.29 cm for a 11.8 kg load?