In your own words, explain what two-dimensional (2-D) and three-dimensional (3-D) models are. Give an example of one you've seen recently.

2. they have negligible mass.

B) erini just took the test and it is correct

The answer is  the potential energy of the bob at position b is 1.47 joules.if the maximum height of the bob is 0.45 meters when it swings back,1.323   joules of energy was transformed to thermal energy.hope this