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

. The horizontal velocity of a projectile changes by 9.8 m/s each second

F

1. A projectile does not have a horizontal velocity.

F

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., the range) of the projectile will always increase as the angle of launch is increased from 0 degrees to 90 degrees.

F

5. The horizontal velocity of a projectile is 0 m/s at the peak of its trajectory.

F

7. The horizontal displacement of a projectile is dependent upon the time of flight and the initial horizontal velocity.

F

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.

F

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., the range) of the projectile will always increase as the launch speed is increased.

T

4. A projectile with a horizontal component of motion will have a constant horizontal velocity.

T

6. The horizontal velocity of a projectile is unaffected by the vertical velocity; these two components of motion are independent of each other.

T

8. The final horizontal velocity of a projectile is always equal to the initial horizontal velocity.

T

2. A projectile with a rightward component of motion will have a rightward component of acceleration.

F