A music box within the toy shown below plays tunes when the toy is
pushed along the floor. As a child pushes along the handlebars with
a force of 5 N, the floor exerts a force of 13 N directly upward on the toy.
The Earth's gravitational force on the toy is 10 N downward while inter-
actions between the wheels and the floor produce a backward force of
2 N on the toy as it moves. Draw a free-body diagram of the toy as it is
being pushed.