Three forces act on an object. if the object is in translational equilibrium, which of the following must be true? i. the vector sum of the three forces must equal zero; ii. the magnitude of the three forces must be equal; iii. the three forces must be parallel.

This is a form of winter precipitation. it is frozen precipitation falling as ice pellets. snowflakes melt into raindrops as they pass through a thin layer of warmer air. the raindrops then refreeze into particles of ice when they fall into a layer of sub-freezing air near the surface of the earth. this precipitation is called a) hail. b) rain. c) sleet. d) snow.