Question

Select ALL correct answers. The contact force is caused by: A. Atoms randomly crashing into each other B. The charged particles that make up one atom pushing or pulling on the charged particles that make up other atoms. C. Protons in the nucleus of one atom repeling each other. D. Electrons of one atom being attracted to the electrons of another atom. E. The force of one object pushing against the force of another object.

Answer 1

Answer:

A. Atoms randomly crashing into each other

E. The force of one object pushing against the force of another object.

Explanation:

Forces can be classified into two categories based upon the the mode of transfer or application:

1. Contact forces

2. Non-contact forces

Contact forces are the ones which require the physical contact of the matter to get transferred and tend to create the affect. Whereas non-contact forces have the field property which transfers the affect of force from one point to another without any physical contact of the matter or the medium.

• Atoms crashing onto each other have some mass and velocity which upon collision impacts the other atoms exerts a contact force.
• The interaction between the charged particles due to their charges is always due to the electric field be it electron or proton, be it within an atom or out of an atom.
• The force between any two objects pushing or pulling each other is also possible only due to contact.