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### PT 1.4 - Testing of Bridge

4.1       Testing

Take video of your bridge testing process and insert here.

4.2       Calculation of efficiency

 (a) Mass of load on bridge = 30 kilogram (b) Mass of bridge = 0.26371 kilogram Efficiency = (a) / (b) 114(3 significant figures) No units

4.3       Discussion of bridge design after testing

1.     What is your score on efficiency? If the efficiency is high/low, what went right/wrong?

My score is 114 on efficiency. I hoped the efficiency to by high. When the bridge bent under the stress, it slipped out of the gap. If we had made it a bit longer, we could have gotten a better efficiency

2.     Which part of the bridge started to give way first? Explain using Physics concepts.

The center of the bridge started to bend first as the stress was applied there.

3.     Which part of the bridge provided the most strength in the testing process? Explain using Physics concepts.

The two main rods at the side of the bridge provided the most strength in the testing process.
The main rods are made thicker than any part of the bridge so they can withstand the most  strength.