Bridge Reflection

Before you test your bridge out, please fill this

PRE_REFLECTION form out.

Test the bridge.   You will need to place it between two stools.   Place material on it, and start adding mass.  You may use 100 g or 500 g masses.

Keep track of:

____mass of bridge (kg)  Remember, 1000g = 1 kg

____mass added to the bridge (kg)   Remember to stay out of the way of the masses.  DO NOT stand under the bridge, or with your head below the bridge.

____weight of the bridge (N)   Weight on Earth = mass(kg) X a(gravity).  The acceleration of gravity on earth is about 10 m/s/s

____weight of the mass added to the bridge (N)

____ length of the bridge (cm)




Take a series of pictures of the bridge

a) before you start  (your group members should all be in this picture)
b) when it has 1 kg of mass on it
c) when it has 2 kg of mass on it
d) when it has 5 kg of mass on it.
e) when it starts to torsion
f) after a bridge collapse

Use these pictures to help you with the reflection, and email me your favorite 3.
Then, fill out the FINAL REFLECTION