Q7 In Figure a/b/c (below), we must apply a force of magnitude 80 N to hold the block stationary at x = -2.0 cm (Fig. c). From that position, we then slowly move the block so that our force does +4.0] of work on the spring-block system; the block is then again stationary. What is the block's position? (Hint: There are two answers.) Choose one . 1 point *=0 Block F = 0 attached 80808080 to spring (a) x positive d F. negative F (5) * negative F. positive (c) Box on a level surface with a spring attached horizontally and connected to a wall. +/- 0.02m O +/-.06m O +/-0.031m O +/-0.049m