1. Projectile Motion
Review

2. In projectile motion, the final horizontal velocity is always equal to:
0 m/s
-9.8 m/s
The initial horizontal velocity
None of the above

3. In projectile motion, if an object is initially only moving horizontally, the initial vertical velocity is always equal to:
0 m/s
-9.8 m/s2
The final horizontal velocity
None of the above

4. In projectile motion, the vertical time is always equal to:
The horizontal time
None of the above

5. In projectile motion, the vertical displacement is always equal to:
The horizontal time
Not enough information

6. A shell is fired at a 30 degree angle upward off a cliff and lands 400m from the base of the cliff. Describe the final vertical velocity.
Positive
Negative
Zero
Unable to be determined

7. A shell is fired at a 30 degree angle upward off a cliff and lands 400m from the base of the cliff. Describe the initial vertical acceleration.
Positive
Negative
Zero
Unable to be determined

8. A shell is fired at a 30 degree angle upward off a cliff and lands 400m from the base of the cliff. Describe the vertical velocity at the peak of its motion.
Positive
Negative
Zero
Unable to be determined

9. A shell is fired at a 30 degree angle upward off a cliff and lands 400m from the base of the cliff. Describe the vertical displacement.
Positive
Negative
Zero
Unable to be determined

10. If an object is fired at an angle, the initial vertical velocity is always equal to:
v(cos θ)
v(sin θ)
-9.8
The initial horizontal velocity
None of the above

11. If an object is fired from the ground at a velocity (v) at an angle and the ground is level, the vertical displacement will equal:
0 m
-9.8 m
The horizontal displacement
None of the above

12. If an object is fired from the ground at an angle and the ground is level, the final vertical velocity will equal:
v(sin θ)
v(cos θ)
-9.8
-v(sin θ)
None of the above

13. Acceleration due to gravity can be considered -9
Acceleration due to gravity can be considered -9.8 m/s 2 when an object travels:
Upward only
Downward only
Horizontal only
Either up or down
None of the above

14. If an object is fired horizontally off a cliff, the initial vertical velocity is:
0 m/s
9.8 m/s
-9.8 m/s
Cannot be determined

15. If an object is fired horizontally off a cliff, the vertical acceleration is:
0 m/s2
9.8 m/s2
-9.8 m/s2
Cannot be determined

16. If an object is fired horizontally off a cliff, the initial horizontal velocity is:
0 m/s
9.8 m/s
-9.8 m/s
Not enough information

17. If an object is fired horizontally off a cliff, the final horizontal velocity is:
0 m/s
9.8 m/s
-9.8 m/s
Same as the initial horizontal velocity
Not enough information

18. If an object is fired horizontally off a cliff, the horizontal acceleration is:
0 m/s2
9.8 m/s2
-9.8 m/s2
Cannot be determined

19. When compared with the time for the vertical motion, the time for the horizontal motion is:
More
Less
The same
Not enough information

20. What term represents the magnitude of a velocity vector?
Acceleration
Distance
Displacement
Speed
Momentum

21. In order to find the height of a projectile, what must be done to the total time (assume symmetrical path)?
Multiply time by 2
Cut time in half
Nothing
Not enough information

22. A shell is fired at a 30 degree angle upward and hits 200m above the place it was shot on an adjacent mountain. Describe the final vertical velocity.
Positive
Negative
Zero
Unable to be determined

23. A shell is fired at a 30 degree angle upward and hits 200m above the place it was shot on an adjacent mountain. Describe the final horizontal velocity.
Positive
Negative
Zero
Unable to be determined