# Projectile concept questions too

```Projectile Concept Questions too
1. For a projectile fired at an angle where along the flight path is the speed the greatest. Why?
2. What is the difference between the vertical acceleration of a projectile rising up in the air compared to when it is
coming down?
3. A rock is thrown upward at 50 degrees with respect to the horizontal. As it rises, its vertical component of velocity
(a) increases
(b) remains the same
(c) decreases
4. A rock is thrown upward at 50 degrees with respect to the horizontal. As it rises, its horizontal component of velocity
(a) increases
(b) remains the same
(c) decreases
5. Roll a bowling ball off the edge of a table. As it falls, its horizontal component of velocity
(a) increases
(b) remains the same
(c) decreases
6. A bullet fired horizontally from a rifle begins to fall
(a) as soon as it leaves the barrel
(b) after air friction reduces its speed
(c) neither of these
Questions 7-8 refer to the diagram below
7. Three projectiles (A, B and C) are launched with different initial speeds so that they reach the same maximum height,
as shown in the figure above. List the projectiles in order of increasing initial speed
8. List the projectiles in order of increasing flight time.
9. Suppose a tank is able to point its barrel up at an angle of 90o. If the tank is in motion and fires a shell straight up,
where will the shell land if the tank maintains a constant motion? (don't consider any air resistance)
a) in front of the tank
b) behind the tank
c) on top of the tank
10. Suppose an airplane drops a package out of its cargo hold while it is travelling through the sky with a constant
horizontal speed. Where will the package land once it hits the ground?
a) directly below the plane
b) below the plane and ahead of it
c) below the plane and behind it
```
Missiles

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