Question: Two children are having a snowball fight, and one is trying to land a snowball on a friend who is hiding behind a wall (Fig.

Two children are having a snowball fight, and one is trying to land a snowball on a friend who is hiding behind a wall (Fig. Q4.2). The child on the left can only throw snowballs with one value of the initial speed and finds that for one throwing angle a that is less than 458 he is able to have his snowball land on his friend. Show that there is a corresponding throwing angle b greater than 458 that yields the same value of the range and find a general relation between a and b.

Figure Q4.2

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