One end of a long,uniform log is raised to shoulder level.Another identical log is raised at its center to the same level.Raising the second log requires about
A)the same amount of work.
B)twice as much work.
C)more than twice as much work.

Question

Quizplus · Accepted Answer

Raising the second log requires twice as much work because the center of mass of the log is raised to a higher position compared to when one end is raised, effectively doubling the height through which the average weight is lifted.

One End of a Long,uniform Log Is Raised to Shoulder