Post a New Question

posted by Jean on Monday, July 1, 2013 at 10:56am.

A rock is ejected vertically upward at 40 m/s. At what time is the rock moving at 20 m/s upward.

v = Vi - g t 20 = 40 - 9.81 t 9.81 t = 20 t = 20/9.81

More Related Questions