Two human cannon-balls, Harry and Frank, are launched, at the same time instant, with the same initial velocity. If the point of launch of Harry was 2 m directly above that of Frank, when are they closest together during the subsequent free flight?
(a) immediately after launch,
(b) when Harry attains his maximum height,
(c) immediately before Frank strikes the ground, (d) always.

Question

Two human cannon-balls, Harry and Frank, are launched, at the same time instant, with the same initial velocity. If the point of launch of Harry was 2 m directly above that of Frank, when are they closest together during the subsequent free flight?
(a) immediately after launch,
(b) when Harry attains his maximum height,
(c) immediately before Frank strikes the ground, (d) always.

anonymous · Answer

At what angle are they launched?