일반물리학 1 — Motion in Two and Three Dimensions: Problem 43

43 A golfer hits a golf ball into the air over level ground. The velocity of the ball at a height of $10.3 \text{ m}$ is $\vec{v} = (8.6 \hat{i} + 7.2 \hat{j}) \text{ m/s}$, with $\hat{i}$ horizontal and $\hat{j}$ upward. Find (a) the maximum height of the ball and (b) the total horizontal distance traveled by the ball. What are the (c) magnitude and (d) angle (below the horizontal) of the ball's velocity just before it touches the ground?