Consider a string with several rocks tied along its length at equally spaced intervals. You whirl the string overhead so that the rocks follow circular paths. Compared to a rock in the middle of the
String, a rock at the outer end moves
A) twice as fast.
B) half as fast.
C) at the same linear speed.

Question

Quizplus · Accepted Answer

A rock at the outer end of the string moves faster because it travels a larger circumference in the same amount of time as a rock in the middle, due to the larger radius of its circular path.

Consider a String with Several Rocks Tied Along Its Length