Basic kinetic friction and mass quesion?

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SUMMARY

The addition of mass m to an object of mass M increases the force of kinetic friction between the object and the floor. This is due to the direct relationship between the normal force, which increases with added mass, and the force of kinetic friction, as described by the equation F_friction = μ_k * N, where μ_k is the coefficient of kinetic friction and N is the normal force. The coefficient of kinetic friction itself remains constant regardless of the mass added, as it is a property of the surfaces in contact.

PREREQUISITES
  • Understanding of Newton's laws of motion
  • Familiarity with the concepts of force and friction
  • Knowledge of the equation for kinetic friction: F_friction = μ_k * N
  • Basic grasp of mass and weight relationships
NEXT STEPS
  • Study the relationship between normal force and frictional force in different scenarios
  • Learn about the factors affecting the coefficient of kinetic friction
  • Explore real-world applications of kinetic friction in engineering
  • Investigate the differences between static and kinetic friction
USEFUL FOR

Students studying physics, educators teaching mechanics, and anyone interested in understanding the principles of friction and motion.

nchin
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An object of mass M is pulled along a rough floor for some time. An additional mass m is then placed on M and is pulled along the same floor as shown.

(The picture is just a square with mass M and a small square right on top of it with mass m)

What effect does the addition of mass m have on the force of kinetic friction between the floor and mass M?

a. The force of kinetic friction increases.
b. The force of kinetic friction decreases.
c. The force of kinetic friction becomes zero.
d. The force of kinetic friction stays the same.

im leaning more towards a because isn't the more mass an object has, the more kinetic friction it will produce?

also same question except what will happen to the coeffecient of kinetic friction?

a. The coeffecient of kinetic friction increases.
b. The coeffecient of kinetic friction decreases.
c. The coeffecient of kinetic friction becomes negative.
d. The coeffecient of kinetic friction stays the same.

what is the definition of coeffecient of kinetic friction?
 
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nchin said:
An object of mass M is pulled along a rough floor for some time. An additional mass m is then placed on M and is pulled along the same floor as shown.

(The picture is just a square with mass M and a small square right on top of it with mass m)

What effect does the addition of mass m have on the force of kinetic friction between the floor and mass M?

a. The force of kinetic friction increases.
b. The force of kinetic friction decreases.
c. The force of kinetic friction becomes zero.
d. The force of kinetic friction stays the same.

im leaning more towards a because isn't the more mass an object has, the more kinetic friction it will produce?
You have some equation/s to support this thinking?

what is the definition of coeffecient of kinetic friction?
Try wiki, spelling it "coefficient".
 

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