Question

淺沫

求證明(b)的過程😭感謝~

(I) A soccer player kicks a ball at 15 m/s at 20° above the
horizontal to another member of the team. At what speed
should the second player run in order to reach the ball just
as it lands? The initial separation of the players is 25 m.
he
(II) A basketball player throws the ball with initial velocity
vo at above the horizontal to the hoop which is located a
horizontal distance L and at a height h above the point of
release, as shown in Fig. 4.44. (a) Show that the initial
the speed required is given by
an
vſ
gL
2 cosO(tan 9 - h/L)
(b) Show that the angle a to the horizontal at which it
reaches the hoop is given by tan a = 2h/L - tan 0.
=
Vo
h
L
FIGURE 4.44 Problem 16