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.
4. Which of the following trials disproved the hypothesis that the final spin rate will always increase as the mass of the student increases?
Your Answer is
Correct Answer is H
Explanation
In trail 6, when the quality of students increases, the final spin rate decreases, so it is opposed to the statement that the increase in mass in the title will definitely increase the spin rate.