If the center of a lie angle impact is 1/2" from the centerline of the face, how many degrees must the lie angle be changed to move the sole impact mark to the centerline of the face?

To determine how many degrees the lie angle needs to be adjusted to move the impact mark on the sole of the club 1/2 inch toward the centerline of the face, we must consider the relationship between the distance a ball is struck off-center and the corresponding adjustment in lie angle.

Lie angle adjustments are typically measured in degrees, and a common rule of thumb is that for every 1 degree of change in lie angle, the impact point on the ground (or sole) shifts approximately 1 inch laterally. Since the impact mark is offset by 1/2 inch, we can apply this principle:

1. Since it is half of an inch, this is equivalent to needing a 1 degree increase in the lie angle to achieve a 1-inch lateral move.

2. Therefore, to move the impact mark from 1/2 inch away back to the centerline of the face, an adjustment of 1/2 degree would be needed.

However, if we consider that changing the lie angle more generally requires a more significant adjustment given standard club design, we derive that for the offset of 1/2 inch being closer to 1 degree, it would be reasonable to conclude that a shift of 2 degrees would effectively