**Vertical Motion of a
Launcher
**

Materials:

**Procedures
and Analysis** (let g = 10 m/s^{2})

**Safety
Notice:
___________________________________________________________________________**

1. Using the plumb line, be sure the launcher is
exactly perpendicular to the surface.

2. Place a ball (plastic or metal) in the
launcher and plunge it down the designated number of clicks.

3. Fire a test round and estimate the maximum
height of the ball.

4. Now, launch the ball for three trials on the
same setting, recording the approximate height to within ±2cm.

5. Repeat for another ball (plastic or metal).

6. For each ball, determine the average maximum
height, then calculate:

a.
time to reach the maximum height.

b.
initial V_{y} velocity

c.
acceleration of gravity at the top of the flight.

d.
total time in the air.

e.
total distance traveled.

f.
total displacement of the ball.

g.
velocity of the ball after ¼ the total time of flight

7. On graph paper, accurately plot the
velocity-time graph for the total time of flight of each ball
using +v_{y} as up and -v_{y} as down.
What does the slope represent?
the total area?

8. Sketch a displacement vs time graph for the
total time of flight for each ball.

9. Set the launcher on a table such that it is
horizontal to the surface. Verify
the launch velocity for each ball using the equations for
vertical fall and the d_{x} the ball travels after
launch.

10. Which velocity is constant, v_{x} or v_{y}?

Back to the Brockport High School Science Department