Answer to Question #60519 in Mechanics | Relativity for mini

Question

when a mass of 40 g is attached to a vertically hanging sprins it extends by 0.4 cm .find:
1 = force constant of the spring .
2 = the extension when 100 g weight is attached to it
3 = the time period of oscillation of 100 g weight on it
4 = the time period and force constant if the spring is cut in three equal parts and 100 g weight is made to oscillate on one part