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Physics, 27.10.2020 04:20 mark177

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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