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

Question

Quizplus · Accepted Answer

Raising the second log requires twice as much work because lifting it from the center means lifting all parts of the log through the same height, whereas lifting from one end means half of the log moves through less than the maximum height, resulting in less work done overall.

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