Physics Project - 2nd Quarter



The Great Physics Egg Drop (50 points) Name:___________ Grade ___________

Purpose: to study the rate of falling object

to build a device to protect a falling egg

to learn about impulse & momentum in stopping the egg

Materials: Only 10 pieces of printer paper and tape

You should package the egg in such a way that you must be able to place the egg in the device properly and remove it after the fall in less than 2 minutes time without damaging the device. You must make a parachute at home and attach it to this device in class

Procedure:

determine fall rate of your egg device

make a drawing of your device and explain how it works

how does it reduce impact force and increase impulse time

how does it increase air friction and reduce final velocity

draw a vector diagram of your egg at terminal velocity

Each group will turn in 2 paragraph typewritten report on how their device works, how it increased air friction and the time of impact and on how the design can be improved upon along with the vector diagram.

Grading: One device per group (4 to 5)

20points - performance - egg does not break _______ points

15 points- penalty if egg cracks

12 points- penalty if egg breaks

10 points- penalty if yolk is broken

15 points – if device falls in 2 seconds or more

11 – 14 points – if device falls between 1.6 and 1.9 seconds

6 – 10 points - if device falls between 1.1 and 1.5 seconds

5 - points if egg falls like a solid device

15 points Report (formative)

10 points design, diagram and explanation _______ points

5 points calculate difference

calculate acceleration rate

calculate impact velocity

Calculations: distance of drop 4.90 m

time of fall (solid) 1.0 sec impact velocity 9.8 m/s g = 9.80 m/s2

time of fall (egg) ___________ s

acceleration rate ___________ m/s2 a = 2 x 4.90 m / t2

impact velocity ___________ m/s v = a x t

Impulse __________ N.s I = m.(vf – vi) (m = mass of egg in kg)

distance of drop ‘d’ = 4.9 m, mass of egg ‘m’ = 0.06 kg, g = 9.8 m/sec2

Impulse = change in momentum = m (vf – vi)

|Egg Drop Project Rubric |

|Looking For… |Way! |Part Way |No Way |

|Protect the egg by increasing|Egg is protected – not even a crack |Shell is cracked, but there is |Egg is broken and yoke is |

|the time of impact |in the shell |no fluid released |destroyed |

|Diagram of your device with |Drawing accurately depicts the |Drawing is missing one or more |Drawing does not represent |

|Force Diagrams |device you have made |critical structures |the device at all |

|Explain how the material you |Use all the principles of physics |Use some of the physics |Nothing relating to physics |

|used had protected the egg |that apply to your device |principles |principles |

|Explain how the device slows |Use all the principles of physics |Use some of the physics |Nothing relating to physics |

|the rate of decent |that apply to your device. What is |principles |principles |

| |terminal velocity? | | |

|Calculations: |Equations show the data you measured|Values are displayed without |Numbers with no equations or|

|Velocity at impact |and the results you obtained |the equations you used |data to support them |

|Impact force | | | |

|Acceleration | | | |

|Conclusions: |Explain how your device might be |Some explanation of things that|No conclusions |

| |improved with unlimited funding |might be done | |

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