Passage I

Students conducted an experiment to see how jumping on a merry-go-round affects how fast it spins. In each case an empty spinning merry-go-round was approached by a student who ran in the direction shown in Figure 1 and then jumped on the edge. Several trials, each consisting of three runs, were performed using students of different masses running at different speeds, and different initial spin rates for the merry-go-round, given in revolutions per minute (rpm). The results are shown in Table 1.

2. In Trial 1, the factor that most directly determined if the final spin rate was greater than the initial spin rate was:

Answer and Explanation

Your Answer is

Correct Answer is H

Explanation

Through the internal comparison of trail2, 3, and 4 in Table 1, it can be found that no matter how the quality of students changes, the impact on spin rate is relatively small. When comparing these three groups, when the student's speed increases, the final spin rate will be greatly affected