Why does jerking a paper towel from a roll cause the paper to tear more easily than pulling it smoothly? Will the amount of paper on the roll affect the results?
Answer to relevant QuestionsA solid cylinder and an annular cylinder of equal mass are rolling on the floor with the same speed. (a) If the solid cylinder’s radius is equal to the annular cylinder’s inner radius, which cylinder would be harder to ...A yo-yo is thrown downward with a rotational spin. Reaching the bottom of the string, it climbs back upward. Is the rotational direction reversed at the bottom? Explain. Telephone and electrical lines are allowed to sag between poles so that the tension will not be too great when something hits or sits on the line. (a) Is it possible to have the lines perfectly horizontal? Why or why not? ...The location of a person’s center of gravity relative to his or her height can be found by using the arrangement shown in Fig. 8.41. The scales are initially adjusted to zero with the board alone. (a) Would you expect the ...The forces acting on Einstein and the bicycle (Fig. 2 of the Insight 8.1, Stability in Action) are the total weight of Einstein and the bicycle (mg) at the center of gravity of the system, the normal force (N) exerted by the ...
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