1. Imagine a cannonball being launched horizontally from a cannon at 50m/s atop of a very high cliff (500 meters). Imagine as well that the cannonball does not encounter any significant amount of air resistance. What will be the path of the cannonball and how can the motion of the cannonball be described? (Assume that gravity is 10m/s/s).

2. Which of the following statements are true of the horizontal motion of projectiles? List all that apply.

1. A projectile does not have a horizontal velocity.
2. A projectile with a rightward component of motion will have a rightward component of acceleration.
3. The horizontal velocity of a projectile changes by 9.8 m/s each second.
4. A projectile with a horizontal component of motion will have a constant horizontal velocity.
5. The horizontal velocity of a projectile is 0 m/s at the peak of its trajectory.
6. The horizontal velocity of a projectile is unaffected by the vertical velocity; these two components of motion are independent of each other.
7. The horizontal displacement of a projectile is dependent upon the time of flight and the initial horizontal velocity.
8. The final horizontal velocity of a projectile is always equal to the initial horizontal velocity.
9. As a projectile rises towards the peak of its trajectory, the horizontal velocity will decrease; as it falls from the peak of its trajectory, its horizontal velocity will decrease.
10. Consider a projectile launched from ground level at a fixed launch speed and a variable angle and landing at ground level. The horizontal displacement (i.e., therange) of the projectile will always increase as the angle of launch is increased from 0 degrees to 90 degrees.
11. Consider a projectile launched from ground level at a fixed launch angle and a variable launch speed and landing at ground level. The horizontal displacement (i.e., therange) of the projectile will always increase as the launch speed is increased.