Question

A spring is hung from a ceiling, and an object attached to its lower end stretches the spring by a distance d = 7.70 cm from its unstretched position when the system is in equilibrium as in the figure below. If the spring constant is 48.0 N/m, determine the mass of the object.
__________ kg

Answer 1

Wo = 48N/m * 0.077m = 3.696 N. = Wt. of
object.

m*g = 3.696 N.
m = 3.696/g = 3.696/9.8 = 0.377 kg.