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BR SPH3U 17
Transcript of BR SPH3U 17
Pillow filling ( down feathers and cotton)
Cardboard boxes Materials Hair Nets- stretched to act like a safety net and catch the egg
String- to act as slack
Wood-To act as support to hold the net up
Composite Foam- To cushion the egg's impact
A Cardboard Box- As the base structure for the catcher
Bolts- to act as counterweights, that is attached to the string, to slow down the egg's impact
Cotton Balls- a soft material to aid in cushioning the egg in case the net hits the surface of the inside of the box DESIGN What We Think We Did Well
Cotton balls cushioned the egg's landing
The net was used to decrease the velocity of the egg as it made contact with the catcher
The foam padding on the net aided in cushioning the egg's impact on the net and the additional foam attached to the bottom of the box Reduce the amount of tension in the net, thus reducing the reactant force of the egg hitting the net, thus reducing the height of the egg's bounce after it hits the net.
Provide better cushioning to absorb the impact of the egg
Possibly line/coat the net with a substance with a high coefficient of friction or low viscosity (i.e rubber/maple syrup/corn syrup) to further reduce the velocity of the egg upon contact.
Another idea to take into consideration is to omit the net entirely and rely solely on the padding of the box Improvements Sources Of Error The person who dropped the egg may have not had a steady hand and as a result the egg did not have an ideal, straight trajectory towards the egg catcher
The tension of the net was too great and as a result when the egg hit the net the elasticity caused the egg to bounce out of the net and onto the surface of the floor and break Results & Equations Average force applied to the egg during landing: 0.04905 N
Interaction Distance between the egg and our egg catcher is approximately 3cm.