Question

Problem 1

Answer 1

Given information

A child in a wagon starts falling backwards when someone pulls the wagon forward.

Step-by-step explanation

Step 1.

The force is applied only on the wagon, not on the child. This applied force causes the wagon to accelerate. The child remains at rest relative to the ground but the wagon continues to move. While the wagon moves forward and the child is at rest, the child will move backward relative to the wagon. The child has inertia so the state of motion of the child will not change unless an external force acts.