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47. We adopt the positive direction choices used in the textbook so that equations such as
Eq. 422 are directly applicable. The coordinate origin is at ground level directly below
impact point between bat and ball. The
Hint
given in the problem is important, since it
provides us with enough information to find
v
0
directly from Eq. 426.
(a) We want to know how high the ball is from the ground when it is at
x
= 97.5 m, which
requires knowing the initial velocity. Using the range information and
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 Spring '08
 Any
 Physics

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