Question

If all matter were made of electrically neutral particles such as neutrons,

• A. there would be no force of friction
• B. there would be no tension in the string
• C. it would not be possible to sit on a chair
• D. the earth could not move around the sun

Answer 1

Answer: (A), (B), (C)

The correct options are
A there would be no force of friction
B there would be no tension in the string
C it would not be possible to sit on a chair

The cause of friction is molecular adhesion, surface roughness & deformations.

Now, when there are no charged particles and only neutral particles, then there would be no interaction between the particles or molecules or atoms and we would not get any solid structure or lattice. So the main cause of friction would be absent. So, there would be no force of friction.

There would be no tension in the string as string would collapse because of absence of a solid structure and it would not be possible to sit on a chair as well.

Friction, down to atomic level is because of electromagnetic forces between positive and negative charges.

Earth moves around sun because of gravitational force.