Passage VI
Various chains were released from rest with their lower end touching a scale that measured the force, in newtons (N), of the chain on the scale pan (see Figure 1). A newton is the force required to accelerate a 1-kilogram mass at a rate of 1.0 m/sec2. The mass of the chain, its total length (L), the momentary length of chain on the pan (x), as well as the momentary weight of the portion of the chain on the pan, were also measured. The results are shown in Table 1.
Figure 1 and Table 1 adapted from John R. Gordon and Raymond A. Serway, Physics for Scientists and Engineers with Modern Physics, 3rd edition. ©1990 by Saunders College Publishing.
31. Which of the following trials best supports the hypothesis is that doubling the mass of a chain while keeping the length of chain on the pan constant doubles the force on the pan?
Your Answer is
Correct Answer is D
Explanation
In the question stem, it is first mentioned that the quality of the chain is doubled, so first exclude options A and B; there is something to say about the length of chain constant, so exclude C