forces between objects

Question 1

what is newton’s 3rd law of motion?

Answer 1

When 2 objects interact, they always exert equal + opposite forces on e/o.

Question 2

what is a contact force?

Answer 2

forces that act between two objects that are physically touching each other eg reaction force, friction, air resistance, stretching forces (tension)

Question 3

what is a non-contact force?

Answer 3

forces that don’t need objects to physically touch eg gravitational force, magnetic force and electrostatic force