Final answer:
VY is given as z, and no additional information is provided to calculate a numerical value. Therefore, VY equals z.
Step-by-step explanation:
The problem statement provides information about midpoints and segment lengths in a geometry context. The information given indicates UW has a midpoint V, and UX has a midpoint Y. The lengths of the segments are given by WX = z + 40 and VY = z. To solve for VY, we can use the property of midpoints which states that the line segment joining the midpoints of two sides of a triangle is equal to half the length of the third side of the triangle.
However, there seems to be a mix-up in the given details as the latter part of the problem description goes into physics-related equations involving velocity components, which do not correspond to the initial geometry question. Ignoring the irrelevant physics details and focusing on the geometry, we are solely concerned with determining the value of VY, which is directly given as z. Since no further information about z or related lengths is provided, we can only state that VY equals z.