4-54. A child throws a snowball straight toward a tree with a horizontal velocity of 18 m/s. The tree is 9.0 m away and the snowball starts from a height of 1.5 m above the ground.

(a) How long will the snowball take to reach the tree?

(b) At what height above the ground will the snowball hit the tree?

(c) What is the snowball's velocity as it hits the tree?

[Ans. (a) 0.50 s (b) 0.3 m. (c) 19 m/s 15° down from the horizontal]

 

First we need a good diagram of the physical situation. Which of the following correctly represents the problem?