Which force is a contact force?

a. the force produced by interactions between electrically charged objects.

b. the force produced by interactions between two masses.

c. the force of attraction between two masses.

d. the force exerted by water when an object floats on it

Answer: (D) : Contact force A contact force is any force that requires contact to occur ... Contact forces are often decomposed into orthogonal components, one perpendicular to the surface (s) in contact called the normal force, and one parallel to the surface (s) in contact, called the friction force. In the Standard Model of modern physics, the four fundamental forces of nature are known to be non-contact forces.

Answer: D

Explanation: I'm thinking it's D because the object is floating on the water, i think that's the closest answer.