Physical principle whose equation explains the changes in this puzzle's theme entries

Question:

Answer:

NEWTONSSECONDLAW

Length:

Similar Crossword Questions:

Levels that are split in this puzzle's theme entries
Activity suggested by this puzzle's theme entries
"Infections" inside this puzzle's theme entries
What the names in this puzzle's theme entries begin with
People who bring you this puzzle's theme entries
Playoff series finale ... or an apt title for this puzzle considering the number and length of its theme entries
It can follow the last word of this puzzle's theme entries
What are featured in the theme entries of this puzzle
Look for bargains (and a hint that explains this puzzle's theme)
Period that ends Nov. 3rd, requiring a shift, and letters that shift in this puzzle's theme entries
Word hidden in this puzzle's theme entries
Find new work - or what you must do to get the three theme entries' names in this puzzle
What the constructor had to do to create the theme entries in this puzzle (boyeee)
Make of six models that are subject to recall ... and being sent back inside this puzzle's theme entries
"Lid" in each of this puzzle's theme entries
This puzzle's theme entries
Like some fillings (as in this puzzle's theme entries)
Decorative physical changes, and a hint to this puzzle's theme
The three in each of this puzzle's theme entries
What this puzzle's theme entries take, vowel-wise
Nickname for the three-letter abbreviation hidden in this puzzle's theme entries
Like the four theme entries in this puzzle, as it were
They're hidden in this puzzle's theme entries
This puzzle's theme entries, e.g.
Many people get one in the summer (and so do this puzzle's theme entries)