Rocket+Masters+Lab+Write+up

Sharlene Monks Joel Phillips Judy Lewis-Germain November 15, 2011 Physics 30, Period 5

** __Rocket Lab Write Up__ **
 * Purpose: ** The purpose of this project is to examine some major concepts that we have studied in Physics 30 through the use of a model rocket.

- PVC tube - PVC glue - Balsa wood - Bingo dabber cap - Dime roller - Large metal paper clip - Yarn - Glad plastic bag - Spray paint - Scotch tape - White glue - Bungee cord - Piece of fleecy - Scissors - Box cutter
 * Materials: **


 * Procedure: ** We took the dime rollder and glued it into the inside of our PVC tube with PVC glue, we then took the tube out to thegrinder to grind down the top so that our nosecone would fit on top. We then painted the tube to get the task out of the way, and then we brought out the balsa wood and cut out our fins to glue onto our rocket. Then we constructed the parachute out of a plastic bag, taped our yarn to it and attached the bungee cord to the rocket body and the nosecone. With all of that done we glued on the guidance straw, painted the fins and it was good to go. After the first launch we had a couple things we had to fix which we will explain in the sources of error part of our lab.

V1=0 Fa-2.51 N/s Fg=914 N Fnet=234.12 N Fair=-450 N d= 65m Avg velocity up=12.2 m/s Avg velocity down= 6.3m/s Time up= 5.32s Timedown=10.4s Angle= 33°
 * Data: **

tan 33°=x/100 x=65m therefore d=65m
 * Analysis: **

Avg up= 65/5.32 =12.2 m/s Avg down= 65/10.4 =6.3 m/s

__Thrust phase:__ Fnet = ma = Fair + Fg + Fa Fnet = ma m= 93.27 a=? d= V1t + 1/2at² 65=0(5.32) = 1/2a(5.32)² 65=1/2a(5.32)² a=5 m/s²

Fnet=466N Fnet = Fair + Fg + Fa 466 = Fair +914 +2.51 Fair = -450N

__Decent phase:__ Fnet = ma = Fair + Fg since the Fnet with = 0 V avg = d/t V avg= 65m/10.4s V avg = -6.25 m/s


 * Sources of Error: ** Our rocket was unbalanced, there wasn't enough wadding between the engine and parachute, and the wind.


 * Conclusion: ** Through th building of our rocket we learned about the different forces acting on objects when they are moving.We had to use our formulas from Kinematics in a real life scenario in order to gain valuable information. We also got a chance to learn and take into account Newton's three laws during the proces. All in all it was a great and valuable experience.