What/where does the power contact live?

A contact force, as the name suggests, acts by making direct contact with a point on an object. Contact can be continuous or temporary. In the former case one speaks of continuous force and in the latter case of impulsive force.
1) Pushing an object across the ground:
This is an example of a sustained force. Here a continuous direct force is applied to the object to move it along the ground.
2) Kicking a soccer ball:
This is an example of impact force. Here we see that a force is applied to a sphere of a certain mass for a certain time, which causes the sphere to recoil in a certain direction at a certain speed.

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