Wednesday, September 28, 2011

Kim's Projectile Motion Lab

Question: How does velocity effect the impact point of a marble rolling off an incline?

Hypothesis: I think the marble will land about 13 and a half away from the table.

Materials:
computer
meter stick
2 Vernier Photogates
A Vernier LabQuest mini
a marble
a ruler
a ramp
an incline

Procedure:
The procedure for this lab was simple, roll a marble down a ramp through two recording gates, then either catch the marble before it hit the ground or let it fall and record where it landed. To begin with, after everything had been set up we started the lab. What we had to do was roll the marble down the ramp 9 times, then see is those we almost the same and lucky for us they were. Then we needed to figure out the time of flight for the marble and the horizontal displacement. Lastly we had to roll the marble down the ramp a few times to see if our hypothesis was correct.

Trial

Velocity

(m/s)

10.611
20.621
30.656
40.627
50.647
60.651
70.658
80.632
90.704
100.618



Maximum velocity0.704 m/s
Minimum velocity0.611 m/s
Average velocity0.645 m/s
Table Height0.806 m
Predicted impact point0.305 m
Minimum impact point distance0.194 m
Maximum impact point distance0.278 m
Actual impact point distance0.25 m


Conclusion:
We found out that our hypothesis was incorrect, close, but still incorrect. We thought the ball would land at about 13 and a half inches, but it landed around 9 meters almost every time. To find out the impact point we used inches then calculated that into meters.