The 20-kg uniform rectangular plate is supposed by an pivot at 0 and spring which much be compressed prior to being slipped into at point A. If the modulus of the spring is R= 2kN/m, what much be its undeformed length L?

N. 0.12 0.48 m atic m red O 0.3 m A 0.1 m k 0.15 m PROBLEM 3/9