일반물리학 1 — Motion in Two and Three Dimensions: Problem 28

28 In Fig. 4-25, a stone is projected at a cliff of height \( h \) with an initial speed of \( 42.0 \text{ m/s} \) directed at angle \( \theta_0 = 60.0^\circ \) above the horizontal. The stone strikes at \( A \), \( 5.50 \text{ s} \) after launching. Find (a) the height \( h \) of the cliff, (b) the speed of the stone just before impact at \( A \), and (c) the maximum height \( H \) reached above the ground.