free-body diagram of a wagon being pulled along a horizontal surface is best represented by
a free-body diagram of a wagon being pulled along a horizontal surface is best represented by the following:
- A box or rectangle to represent the wagon
- An arrow pointing to the right to represent the pulling force
- An arrow pointing upwards to represent the normal force exerted by the surface on the wagon
- An arrow pointing downwards to represent the weight of the wagon
- Frictional force might also be included, pointing to the left, depending on the specific conditions of the problem.