Kinetic Friction Formula

Good afternoon friends around the World from the U.S.!
http://drtjgunn.com/index.php/forum

Kinetic Friction Formula

Kinetic friction is a force that acts between moving surfaces. An object that is being moved over a surface will experience a force in the opposite direction as its movement. The magnitude of the force depends on the coefficient of kinetic friction between the two kinds of material. Every combination is different. The coefficient of kinetic friction is assigned the Greek letter “mu” (μ), with a subscript “k”. The force of kinetic friction is μk times the normal force on an object, and is expressed in units of Newtons (N).

force of kinetic friction = (coefficient of kinetic friction)(normal force)

Fk = μk η

Fk = force of kinetic friction

μk = coefficient of kinetic friction

η = normal force (Greek letter “eta”)

Kinetic Friction Formula Questions:

1) A worker in a stock room pushes a large cardboard box across the floor. The coefficient of kinetic friction is μk = 0.520. The box has a mass of 75.0 kg, and the worker is exerting a force of 400.0 Nforward. What is the magnitude of the force of friction, and what is the net force moving the box?

Fk = μk η

Fk = μk mg

Fk = (0.520)(75.0 kg)(9.80 m/s2)

Fk = 382.2 kg∙m/s2

Question: Fk = ???.? N

The force of kinetic friction acting in the opposite direction as the motion of the box is 382.2 N. The net force acting on the box is the sum of forces. The two forces to consider are the force of kinetic friction acting in the opposite direction as the box’s motion, and the force exerted by the worker, which is 400 N forward. If we define “forward” as the positive direction, the net force is:

Fnet=Fworker-Fk

Fnet=400.0 N-382.2N

Fnet = ??.? N

The net force acting on the box is ??.? N forward.

2) A woman is skiing straight down a snow-covered hill. The coefficient of kinetic friction between the skis and the snow is μk = 0.0800. The hill is at a 60.0° angle from the horizontal. The skier’s mass is 55.00 kg. What is the magnitude of the force of kinetic friction, and what is the net force along the skier’s direction of motion?

Answer: On a flat surface, the normal force on an object is η = mg. On a surface that is at an angle relative to the horizontal axis, The total force due to gravity, F = mg, must be broken in to components. The normal force is the component that is perpendicular to the angled surface, and the remaining force is parallel to the angled surface. The normal force is η = mg cosθ, and the remaining force component is F = mg sinθ. Using this, the formula can be used to find the magnitude of the force of kinetic friction:

Fk = μk η

Fk = μk mg cosθ

Fk = (0.0800)(55.00 kg)(9.80 m/s2)cos(60°)

Fk = 21.6 kg∙m/s2

Fk = 21.6 N

The force of kinetic friction opposes the motion of the skier. The force that moves the skier down the hill is the remaining component of the force of gravity, Fθ = mg sinθ. This force is:

F = mg sinθ

F =(55.0 kg)(9.80 m/s2)sin(60°)

F = 466.8kg∙m/s2

F = 466.8N

The net force acting on the skier is the sum of forces. The two forces to consider are the force directed down the hill and the force of kinetic friction directed up the hill. If we define the positive direction as down the hill, which is the skier’s direction of motion, the net force is:

Fnet = F-Fk

Fnet = 466.8 N-21.6 N

Question: Fnet = ???.? N

68 Comments on Kinetic Friction Formula

  1. This article says so much more info than other people, and it’s very useful to me. Will be returning to see more writing from you! mind if I share this?

  2. Would you please clarify some things? Your goals should be accepted without question…but..There are more reasons that synergize with this. I hope so- ty for reading.

  3. [url=https://albendazole400.com/]albendazole tablets 400 mg[/url]

  4. [url=https://albendazole400.com/]albendazole[/url]

  5. [url=http://cafergot100.com/]cheap cafergot[/url] [url=http://sildenafil1000.com/]sildenafil[/url] [url=http://generictadalafil20mg.com/]generic cialis tadalafil[/url] [url=http://levitrasale.com/]levitra[/url] [url=http://atarax10.com/]atarax tablets[/url] [url=http://lisinoprilbuy.com/]lisinopril no prescription[/url] [url=http://sildalis120.com/]sildalis online[/url] [url=http://wellbutrin300.com/]150 mg wellbutrin[/url] [url=http://azithromycin100.com/]purchase azithromycin[/url] [url=http://allopurinolzyloprim.com/]allopurinol ordering[/url] [url=http://hydrochlorothiazide25.com/]hydrochlorothiazide 25[/url] [url=http://doxycycline02.com/]doxycycline capsules[/url] [url=http://buydiflucan.com/]buy diflucan online[/url] [url=http://xenical120mg.com/]generic xenical[/url] [url=http://tetracycline365.com/]tetracycline online no prescription[/url]

  6. [url=https://sildalis120.com/]sildalis[/url] [url=https://sildenafil1000.com/]sildenafil price[/url] [url=https://wellbutrin300.com/]wellbutrin medication[/url] [url=https://vardenafilbuy.com/]vardenafil buy online[/url] [url=https://allopurinolzyloprim.com/]allopurinol cost[/url]

  7. [url=https://paydayloansonline.us.com/]what is a cash advance[/url] [url=https://simpleloan.us.org/]easy loans[/url] [url=https://lending.us.org/]payday lending[/url] [url=https://moneyfast.us.org/]money fast[/url] [url=https://badcredit.us.org/]bad credit loans[/url]

  8. [url=http://simpleloan.us.org/]loan online[/url] [url=http://moneyfast.us.org/]money fast[/url]

  9. [url=http://allopurinolzyloprim.com/]allopurinol[/url] [url=http://buydiflucan.com/]purchase diflucan online[/url] [url=http://zoviraxacyclovir.com/]acyclovir[/url] [url=http://generictadalafil20mg.com/]cialis tadalafil[/url] [url=http://tetracycline365.com/]buying tetracycline online[/url] [url=http://sildenafil1000.com/]sildenafil over the counter[/url] [url=http://levitrasale.com/]levitra[/url] [url=http://lisinoprilbuy.com/]lisinopril 5mg tablets[/url] [url=http://sildalis120.com/]generic sildalis[/url] [url=http://hydrochlorothiazide25.com/]hydrochlorothiazide 25 mg for sale[/url]

  10. [url=https://badcredit.us.org/]bad credit loans[/url] [url=https://lender.us.org/]loans instant[/url] [url=https://simpleloan.us.org/]personal loans online[/url] [url=https://lending.us.org/]where to get a loan with bad credit[/url] [url=https://paydayloansonline.us.com/]payday loans online[/url]

  11. [url=https://cafergot100.com/]buy cafergot online[/url] [url=https://hydrochlorothiazide25.com/]hydrochlorothiazide 25[/url] [url=https://atarax10.com/]atarax[/url]

  12. [url=https://levitrasale.com/]levitra 20 mg[/url] [url=https://hydrochlorothiazide25.com/]hydrochlorothiazide 12.5 mg[/url] [url=https://atarax10.com/]atarax 10mg[/url] [url=https://zoviraxacyclovir.com/]acyclovir[/url] [url=https://azithromycin100.com/]azithromycin 500 mg tablets[/url] [url=https://buydiflucan.com/]where can i buy diflucan[/url] [url=https://lisinoprilbuy.com/]lisinopril 40 mg tablets[/url]

  13. [url=http://sildenafil1000.com/]sildenafil citrate tablets[/url] [url=http://sildalis120.com/]buy sildalis[/url] [url=http://femaleviagra24.com/]buy female viagra uk[/url] [url=http://levitrasale.com/]buy levitra online cheap[/url] [url=http://allopurinolzyloprim.com/]no prescription allopurinol[/url] [url=http://vardenafilbuy.com/]buy vardenafil uk[/url] [url=http://zoviraxacyclovir.com/]acyclovir[/url] [url=http://wellbutrin300.com/]wellbutrin[/url] [url=http://cafergot100.com/]cafergot[/url] [url=http://lisinoprilbuy.com/]40 mg lisinopril[/url]

  14. [url=https://doxycycline02.com/]doxycycline prices[/url] [url=https://atarax10.com/]atarax[/url] [url=https://vardenafilbuy.com/]buy vardenafil cheap[/url] [url=https://buydiflucan.com/]buy diflucan for yeast infection[/url] [url=https://sildenafil1000.com/]where to buy sildenafil online[/url] [url=https://generictadalafil20mg.com/]tadalafil[/url] [url=https://wellbutrin300.com/]wellbutrin sr generic[/url] [url=https://cafergot100.com/]cafergot generic[/url] [url=https://tetracycline365.com/]tetracycline prescription[/url] [url=https://sildalis120.com/]sildalis[/url]

  15. [url=https://generictadalafil20mg.com/]tadalafil[/url] [url=https://sildenafil1000.com/]sildenafil tablets 100mg[/url] [url=https://levitrasale.com/]levitra online usa[/url] [url=https://atarax10.com/]atarax pill[/url] [url=https://buydiflucan.com/]diflucan buy online[/url] [url=https://azithromycin100.com/]azithromycin price[/url] [url=https://cafergot100.com/]cafergot[/url] [url=https://hydrochlorothiazide25.com/]hydrochlorothiazide 25[/url] [url=https://atenolol25.com/]atenolol[/url] [url=https://zoviraxacyclovir.com/]buy acyclovir without a precription[/url]

  16. [url=https://doxycycline02.com/]100 mg doxycycline[/url] [url=https://atenolol25.com/]atenolol 50mg[/url] [url=https://atarax10.com/]atarax generic[/url] [url=https://azithromycin100.com/]azithromycin[/url]

  17. [url=https://simpleloan.us.org/]easy loans no credit check[/url] [url=https://badcredit.us.org/]loans by phone[/url] [url=https://moneyfast.us.org/]money fast[/url] [url=https://lending.us.org/]payday lending[/url] [url=https://paydayloansonline.us.com/]payday loans[/url]

  18. [url=https://wellbutrin300.com/]150 mg wellbutrin[/url] [url=https://vardenafilbuy.com/]vardenafil buy[/url] [url=https://xenical120mg.com/]xenical buy[/url]

  19. [url=https://femaleviagra24.com/]female viagra cheap[/url] [url=https://vardenafilbuy.com/]vardenafil buy[/url] [url=https://tetracycline365.com/]purchase tetracycline online[/url] [url=https://levitrasale.com/]levitra online sales[/url] [url=https://buydiflucan.com/]diflucan cost[/url] [url=https://atarax10.com/]generic for atarax[/url] [url=https://cafergot100.com/]cafergot[/url] [url=https://sildenafil1000.com/]buy sildenafil[/url] [url=https://wellbutrin300.com/]wellbutrin generics[/url] [url=https://allopurinolzyloprim.com/]allopurinol buy online[/url]

  20. [url=https://lending.us.org/]direct payday loan lenders[/url]

  21. [url=http://atarax10.com/]generic for atarax[/url] [url=http://doxycycline02.com/]buy doxycycline online[/url] [url=http://femaleviagra24.com/]female viagra[/url] [url=http://sildenafil1000.com/]sildenafil[/url] [url=http://allopurinolzyloprim.com/]order allopurinol online[/url]

  22. [url=http://allopurinolzyloprim.com/]buy allopurinol[/url] [url=http://xenical120mg.com/]xenical where to buy[/url] [url=http://wellbutrin300.com/]wellbutrin[/url] [url=http://generictadalafil20mg.com/]tadalafil[/url] [url=http://femaleviagra24.com/]female viagra[/url] [url=http://zoviraxacyclovir.com/]where to buy zovirax[/url]

  23. [url=http://vardenafilbuy.com/]vardenafil drug[/url] [url=http://sildalis120.com/]sildalis[/url] [url=http://generictadalafil20mg.com/]tadalafil[/url] [url=http://buydiflucan.com/]buy fluconazole no rx[/url] [url=http://xenical120mg.com/]xenical 120 mg for sale[/url]

  24. [url=https://hydrochlorothiazide25.com/]hctz no prescription[/url] [url=https://generictadalafil20mg.com/]tadalafil[/url] [url=https://allopurinolzyloprim.com/]buy allopurinol online[/url] [url=https://femaleviagra24.com/]female viagra[/url] [url=https://doxycycline02.com/]vibramycin[/url]

  25. [url=https://tetracycline365.com/]order tetracycline online without prescription[/url] [url=https://hydrochlorothiazide25.com/]hydrochlorothiazide 25[/url] [url=https://sildalis120.com/]generic sildalis[/url] [url=https://doxycycline02.com/]doxycycline[/url] [url=https://femaleviagra24.com/]female viagra[/url] [url=https://atenolol25.com/]atenolol[/url] [url=https://vardenafilbuy.com/]buy vardenafil uk[/url] [url=https://atarax10.com/]atarax 25mg tab[/url] [url=https://levitrasale.com/]levitra[/url] [url=https://xenical120mg.com/]orlistat 120mg[/url]

  26. [url=https://moneyfast.us.org/]money quick[/url] [url=https://simpleloan.us.org/]simple loan[/url] [url=https://paydayloansonline.us.com/]online payday loans[/url] [url=https://lending.us.org/]direct payday loan lenders[/url] [url=https://badcredit.us.org/]payday loan direct lenders[/url]

  27. [url=http://paydayloansonline.us.com/]payday loans online[/url]

  28. [url=https://allopurinolzyloprim.com/]allopurinol[/url] [url=https://lisinoprilbuy.com/]lisinopril[/url] [url=https://sildalis120.com/]buy sildalis[/url] [url=https://azithromycin100.com/]azithromycin[/url] [url=https://wellbutrin300.com/]wellbutrin[/url]

  29. [url=https://homeworks.us.com/]help me with my homework[/url] [url=https://buyessayonline.us.com/]online essay[/url]

  30. [url=https://buydiflucan.com/]buy cheap diflucan online[/url]

  31. [url=http://doxycycline02.com/]buy doxycycline for dogs[/url] [url=http://allopurinolzyloprim.com/]buy allopurinol[/url] [url=http://zoviraxacyclovir.com/]generic zovirax[/url] [url=http://vardenafilbuy.com/]buy vardenafil uk[/url] [url=http://sildenafil1000.com/]sildenafil for women[/url] [url=http://generictadalafil20mg.com/]generic tadalafil 20mg[/url] [url=http://tetracycline365.com/]tetracycline[/url] [url=http://atenolol25.com/]atenolol[/url] [url=http://xenical120mg.com/]cheapest xenical orlistat[/url] [url=http://wellbutrin300.com/]wellbutrin sr 150mg[/url]

  32. [url=http://atenolol25.com/]atenolol[/url]

  33. [url=https://badcredit.us.org/]bad credit loans[/url] [url=https://lending.us.org/]direct lenders for bad credit[/url] [url=https://paydayloansonline.us.com/]long term loans for bad credit[/url] [url=https://lender.us.org/]loan interest rate[/url] [url=https://moneyfast.us.org/]payday loans missouri[/url]

  34. [url=https://homeworks.us.com/]do my history homework for me[/url] [url=https://buyessayonline.us.com/]buy essays[/url]

  35. [url=https://lending.us.org/]payday lending[/url] [url=https://moneyfast.us.org/]borrow money[/url] [url=https://paydayloansonline.us.com/]loans online[/url] [url=https://badcredit.us.org/]loan bad credit[/url] [url=https://lender.us.org/]how to borrow money[/url]

  36. [url=https://femaleviagra24.com/]female viagra buy online[/url] [url=https://levitrasale.com/]levitra[/url] [url=https://generictadalafil20mg.com/]tadalafil[/url] [url=https://vardenafilbuy.com/]buy cheap vardenafil[/url] [url=https://xenical120mg.com/]purchase xenical[/url] [url=https://buydiflucan.com/]diflucan oral[/url]

  37. [url=https://sildenafil1000.com/]sildenafil[/url] [url=https://levitrasale.com/]levitra sales[/url] [url=https://wellbutrin300.com/]wellbutrin xr[/url] [url=https://lisinoprilbuy.com/]lisinopril 5 mg[/url] [url=https://xenical120mg.com/]xenical orlistat 120mg[/url] [url=https://doxycycline02.com/]buy doxycycline[/url] [url=https://atarax10.com/]atarax pills[/url] [url=https://vardenafilbuy.com/]vardenafil uk[/url] [url=https://atenolol25.com/]atenolol[/url] [url=https://tetracycline365.com/]tetracycline for acne[/url] [url=https://zoviraxacyclovir.com/]acyclovir online pharmacy[/url] [url=https://cafergot100.com/]cafergot[/url] [url=https://hydrochlorothiazide25.com/]hydrochlorothiazide 25[/url] [url=https://sildalis120.com/]sildalis buy[/url] [url=https://allopurinolzyloprim.com/]order allopurinol[/url]

  38. [url=http://azithromycin100.com/]azithromycin 500 dosage online pharmacy[/url] [url=http://generictadalafil20mg.com/]tadalafil india 20mg[/url] [url=http://cafergot100.com/]cafergot medication[/url] [url=http://levitrasale.com/]livitra[/url] [url=http://atenolol25.com/]atenolol no prescription[/url] [url=http://tetracycline365.com/]tetracyclin[/url] [url=http://vardenafilbuy.com/]vardenafil buy[/url] [url=http://buydiflucan.com/]diflucan cream[/url] [url=http://lisinoprilbuy.com/]lisinopril 5 mg[/url] [url=http://sildenafil1000.com/]buy sildenafil citrate[/url]

Leave a comment

Your email address will not be published.