Law of Interaction

Question 1

“When one object exerts a force (action) on a second object, the second object exerts a force (reaction) on the first object that is equal in magnitude but opposite
in direction.”

Answer 1

Third Law of Motion/Law of Interaction

Question 2

They are co-parts of a single interaction and neither force exists without the other. They are equal in strength but opposite in direction.

Answer 2

Action force and Reaction force

Question 3

It is the force that opposes the motion between two surfaces that are in contact.

Answer 3

Friction

Question 4

The formula of the coefficient of friction:

Answer 4

μ = Ff/N

Question 5

It acts on objects when they are resting on a surface. It includes all cases in which the frictional force is sufficient to prevent relative motion between surfaces. If you try to slide two objects past each other, a small amount of force will result in no motion. The force of friction is greater than the applied force.

Answer 5

Static Friction (fs)

Question 6

It is defined as a force that acts between moving surfaces. Anything that rubs, slides, or slips has some kinetic friction. If you apply a little
force, the object “breaks free” and slides, although you still need to apply force to keep the object sliding.

Answer 6

Sliding friction or Kinetic friction (fk)