Question

2.11 unit test
started: sep 30 at 3:01pm
quiz instructions
question 16
which is a contact force?
fluid
molecular
magnetic
gravity

Explanation:

Contact forces act on objects when they are in physical contact. Fluid force occurs when a fluid (liquid or gas) interacts with an object in contact with it. Molecular forces can act at a distance at the molecular - scale but also involve contact - like interactions at close range. Magnetic and gravitational forces are non - contact forces as they act between objects without physical contact.

Answer:

Fluid