M2 M₁ h 3 A RIGID BOX WEIGHS W₂ = Mg, iT CONTAINS A MASS AT TIME •h" M, CONNECTED WITH A SPRING R. THE Box is AT A HEIGHT t-o iN EQUILIBRIUM. a) DETERMINE FORCE IN THE SPRING AT tod " b) iF -1 AND THE Box is DROPPED; WHAT IS THE FORCE is THE SPRING 0.25s AFTER RELEASE (ASSUMING IT HAS NOT HIT THE GROUND) NOTE: Take M₂»M,

Fig: 1