Q: What force occurs whenever two surfaces come into contact?


Read this paragraph and choose the correct option from the provided answers:

Even if Laura didn’t try to stop the skateboard, it would stop sooner or later. That’s because there’s also friction between the wheels and the pavement. Friction is a force that counters all kinds of motion. It occurs whenever two surfaces come into contact.

 Choices:

- tension

- vibration

- gravity

- friction


A:
friction