Sally is playing on a merry-go-round, a circular device that spins you round and round. If Sally moves from the edge of the merry go-round to the middle, the merry go-round will:
A)Spin slower.
B)Stop.
C)Spin faster.
D)Begin to decelerate.
E)Lift off the ground.

Question

Quizplus · Accepted Answer

The merry-go-round will spin faster. Due to the concept of inertia, a body spinning near the edge requires more energy than a body spinning closer to the center of the spinning object. Thus, as Sally moves closer to the middle, energy must be conserved, resulting in a faster overall spin.

Sally Is Playing on a Merry-Go-Round, a Circular Device That