Current Attempt in Progress ) In the gure, a constant force F a of magnitude 86.0 N is applied to a 6.0 kg shoe box at angle (15 = 56.0, causing the box to move up a _) frictionless ramp at constant speed. How much work is done on the box by F a when the box has moved through vertical distance h = 0.25 m? Number n Units V In the gure, we must apply a force of magnitude 84.0 N to hold the block stationary atx = -3.00 cm. From that position, we then slowly move the block so that our force does +4.00 J of work on the springblock system; the block is then again stationary. What are the block's positions? ((a) positive and (b) negative) Block attached to spring .1: negative I; posutwe '|'* D (b) (a) Number a Units V (b) Number l Units V