Impetus, Thrust, Motion
This page is the CodyCross answer for the clue below from Peru, Group 1874, Puzzle 1 (Iquitos Jungle).
Question is: Impetus, Thrust, Motion
and the answer is: MOMENTUM
Word Meaning:
MOMENTUM — (physics) Of a body in motion: the tendency of a body to maintain its inertial motion; the product of its mass and velocity, or the vector sum of the products of its masses and velocities.
Definitions from Wiktionary.