Arrow 1 is dropped straight down at while Arrow 2 is fired horizontally with an initial speed of 20 m/s. Both are initially at a height of 45 meters above the ground. 1. Which arrow (ball) will hit the ground first? Why? Predict:
Arrow 1
EXAMPLE – Horizontal Projectiles
00
45 meters
Actual:
Arrow 2
20 m/s
vf v0 at
xx vt1at2
2
2. What do you know about the horizontal direction? The vertical direction? How does that help simplify the equations above?
3. How long will it take arrow 1 to strike the ground?
4. How long will it take for arrow 2 to strike the ground? Look familiar?? Why?
5. What is the velocity of arrow 1 just as it hits the ground?
6. What is the resultant velocity of arrow 2 just as it hits the ground?
7. What will be the horizontal distance traveled by arrow 2?