Superman is standing 120 m horizontally away from Lois Lane
Superman is standing 120 m horizontally away from Lois Lane. A villain throws a rock vertically downward with a speed of 2.8 m/s from 14.0 m directly above Lois.
(a) If Superman is to intervene and catch the rock just before it hits Lois, what should be his minimum constant acceleration?
(b) How fast will Superman be traveling when he reaches Lois?
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