When you push a child in a swing,you most likely
A)push with as large a force as possible.
B)push with a periodic force as often as possible.
C)push with a periodic force,with a period that depends on the weight of the child.
D)push with a periodic force,with a period that depends on the length of the ropes on the swing.
E)push with a force equal to the weight of the child.

Question

Quizplus · Accepted Answer

When pushing a child in a swing, it is best to push with a periodic force that matches the natural frequency of the swing, which depends on the length of the ropes. Pushing with this frequency will cause the amplitude of the swing to increase, allowing the child to swing higher and higher with each push. Pushing with a force equal to the weight of the child or with a large force would not be as effective, and pushing with a periodic force that depends on the weight of the child could be difficult to determine accurately.

When You Push a Child in a Swing,you Most Likely