Question

question 3
which of the following are contact forces? choose all that apply.
□ electromagnetic force
□ gravity
□ applied force
□ friction

Explanation:

Contact forces require physical contact between objects. Applied force is when a force is exerted by one object on another through contact. Friction is a force that resists the relative motion of two surfaces in contact. Electromagnetic force and gravity are non - contact forces as they can act at a distance.

Answer:

C. applied force, D. friction