A child is on a playground they start to slide down a large slide. At what point is the child in dynamic equilibrium with the slide?

Question

When the child pushes themselves down the slides.
When the child pushes themselves down the slides.
As the child is in motion as they are sliding down.
As the child is in motion as they are sliding down.
When the slide ends and the child has stopped moving .
When the slide ends and the child has stopped moving .
The child will not reach dynamic equilibrium.

Answer 1

Dynamic equilibrium occurs when the forces acting on an object are balanced, resulting in constant velocity (which can be zero). In the context of a child sliding down a slide, the child is not in dynamic equilibrium while they are in motion because there are unbalanced forces acting on them (gravity pulling them down and friction slowing them down).

The conditions upon which the child is in dynamic equilibrium would occur when they reach the bottom of the slide and come to a stop, as there would be no net force acting on them at that moment.

So, the correct answer is:

When the slide ends and the child has stopped moving.