Click and drag answers to change the order, or select using ↹ Tab then move by pressing Space and the ↑ ↓ arrows on your keyboard.
the difference between the spring's stretched and unstretched length
a reversible (temporary) change in length of a spring
a permanent change in length of a spring
To pick up a draggable item, press the space bar.
While dragging, use the arrow keys to move the item.
Press space again to drop the item in its new position, or press escape to cancel.