일반물리학 1 — Center of Mass and Linear Momentum: Problem 47

47 A particle of mass 2.0 m is projected at an angle of 45° with the horizontal with a speed of 20√2 m/s. After 1.0 s, an explosion occurs and the particle is broken into two equal pieces. One piece is momentarily at rest before it falls. Find the maximum height attained by the other piece.