Based on the assumption that the loss in speed that is due to friction is responsible for longer travel times down the inclined plane, which of the following lists of objects used in Experiment 2 is in order of increasing loss of
speed due to friction?
A. Plastic, aluminum, wood, concrete
B. Glass, aluminum, wood, concrete
C. Aluminum, steel, wood, concrete
D. Concrete, wood, glass, aluminum

Experiment 2
The students conducted a similar experiment as in Experiment 1 to test the effect of volume on the time that it took for the blocks to move down the inclined plane. The results are shown in Table 2.

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Time (s) Block Volume of Mass of material block (cm³) block (g) Trial 1 Trial 2 Trial 3 Average 1.70 1.72 1.65 1.69 Wood Steel Aluminum Glass Plastic Concrete 2,725 190 550 750 1,150 Table 2 650 1,500 1,500 1.32 1.28 1.33 1,500 1.36 1.38 1.37 1.37 1,500 1.30 1.32 1.29 1,500 1.44 1.41 1.44 1,500 2.47 2.41 1.31 1.30 1.43 2.53 2.47