Problem 4-54 - Projectile - Part 3 - B

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) \(19\; m/s\; 15^\circ\) down from the horizontal]


Accumulated Solution

Diagram of coordinate system.


Correct!

Above is shown the figure with that information added.

We are now going to suggest a format for solving these problems that will help in organizing the solution. Divide the page in two and accumulate the \(x\)-solution in the left column and the \(y\)-solution in the right. Let's deal with the \(x\) first.
 
The motion in the \(x\)-direction is:

(A)  Motion at constant velocity \((a_x = 0)\).

(B)  Accelerated motion.