Project #2 Egg Parachute

Important Dates

Monday & Tuesday,

Oct 30th and Oct 31st

Practice Parachute Drops  (no eggs) 3:30 to 4:00

Block day, Nov. 1st or 2nd

Drop Day!  No Late Drops.  Your project is due in your class period.

Friday, Nov. 3rd

Project report due at the beginning of your class, even if you are absent (send it electronically!)

Late work is penalized according to the rubric below.

Work in a group of up to 3 people.

        Three people in a group is the maximum, NO EXCEPTIONS for any reason.  Choose group members from your hour of physics.  Choose wisely.  If you don't think someone who wants to work with you will follow through, don't sign up to work with him/her. After you sign your group up: exchange contact information, plan meeting times, and decide as a group who will do what by when.  If a group member is not following through with his/her obligations, you may not kick him/her out of your group without having a whole-group mediation session with a physics teacher at least one full week prior to drop day.

What do we build? A parachute attached to a separate egg containment device.  The total mass of the parachute and containment device must not exceed 200g (without egg).  You may not have anything that uses a motor or any gasses (including air).

 What must this parachute/egg containment device do? It must deliver a raw egg (55g) safely to the ground when dropped from the balcony by the east doors, with the longest possible time.   The egg must start at balcony height, and multiple people can support the parachute before dropping (parachutes may not be thrown).

 How many trials do we get? One trial. If you score perfect or better on all parts on the flight/landing section of the rubric, you will receive bonus points.

 What can we use to build the parachute? Anything you want except ready-made parachutes or kits for making parachutes.  Your parachute must be of original design and materials.

 What can we use to build the egg containment device?  Anything you want, but the egg must be easily placed into your containment device just before the drop.  Your instructor will time the loading of the egg.  More than twenty seconds will result in a penalty of points. Your egg must then be easily retrieved after dropping.  There may not be any protective residue left on the egg. We will use grade A large eggs supplied by your teacher (actual sizes of eggs vary--be prepared).

 How will we be graded? Your grade will be based on three parts:

§  Your parachute/containment device– we encourage you to spend less than $5 on the project.  The project must be constructed by your team.  Points will be awarded for creativity, egg placement, and materials used.  No sharing of materials or parts is permitted.  All projects must be clearly labeled with team members’ names.  You must have total, appropriate, complete disposal of your project by the end of the day after competition day. 

 §  The Flight/Landing – You will be graded on time it takes your egg to land and the condition of the egg after landing. There are no late drops, so be ready on time.

 §  Your Team Report – One report per team will be turned in at the beginning of your Physics period on Friday, Nov. 3rd.  The report will be neatly drawn, and have complete and easy to follow calculations.  The report is due at the start of your physics class.  Reports will lose 1 point per minute late, up to 8 total points lost per day.  This means you will lose 2 letter grades per day that you are late.) It must include, in this order:

             o    Your team scoring rubric including all member names, teachers, class periods, and launching period; stapled, rubric side up, on top of report.

o    a full-page detailed drawing of your parachute and egg device with all measurements, materials,  and parts labeled.  Use a straight edge for straight lines, sketch in pencil before finalizing, add color if you like.

o    a labeled force diagram showing all the forces and their directions on your egg/containment device. This includes the type of force and its magnitude and direction.

o    Your  calculations: Neatly done and well organized, with Givens, Equations, Substitutions, and Final Answer (with correct units). State your answer in a complete sentence. You will find:

1.        the actual acceleration of your egg/parachute/containment device as it fell.

2.        the net force on the egg/parachute/containment device as it fell.

3.        the weight (force of gravity) of the egg/parachute/containment device.

4.        the force of air resistance acting on the egg/parachute/containment device as it fell (assuming a constant force).

5.        the speed of the egg/parachute/containment device right before it hit the ground.

6.        assuming that the egg/parachute/containment device took 0.050 s to come to a complete stop when it made contact with the floor, find the acceleration it experienced in stopping.

7.        the force your egg/parachute/containment device experienced in stopping.

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Julie Cassady,
Oct 12, 2017, 11:46 AM
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