For this FBD, we split the axises and solved for the missing angles. We were given two angles, 37 and 69. We knew that in order to find the other two, it must add up to equal 90. Therefore, 90-37=53 and 90-69=21. After we solved for those, we split up the x and y axises and knew that the FBD must have vectors in equal length since it is not in motion. We were also given .85 N and 2.2 N on either side respectively. In order to solve for our prediction, we used cosine.
cos (21) x 2.2
2.0538 (FtyA)
cos (53) x .85
.5115 (FtyB)
2.0538+0.5115= 2.653 N
We did the cosine of both 2.2 N and .85 N and then added the two numbers together to find our predicted weight. It is predicted that the weight of the mystery bag is 2.653 N.
Actual Weight:
Percent Error:
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