A 2.0-m rope is lying on a table.You pick up one end and start raising it vertically.How high above the table is the center of mass of the rope when half of the rope has lifted off the table?
A)0.25 m
B)0.50 m
C)0.75 m
D)1.0 m
E)1.5 m

Question

Quizplus · Accepted Answer

When half of the rope is lifted off the table, the center of mass of the lifted portion is at the midpoint of that half, which is 0.5 m from the end being lifted. Since this is half the rope, the midpoint is 0.25 m from the table.

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