A 200 pound box of books on the floor requires a 140 pound horizontal force to make it start sliding on the floor, but only a 50 pound force to keep it sliding at a constant speed. What is the coefficient of static friction between the box and the floor?
Explain answer please
2006-10-25 15:42:37 · 2 answers · asked by ??? 2 in Science & Mathematics ➔ Physics
I need step by step instructions if possible
2006-10-25 16:03:18 · update #1
I got .0714 but that doesnt seem right....
2006-10-25 16:41:34 · update #2
The coefficient of static friction is 140/200 = 0.70
The coefficient of kinetic friction is 50/200 = 0.25
I hope this helps.
2006-10-26 06:20:22 · answer #1 · answered by karlterzaghi 2 · 0⤊ 0⤋
Coef Static Friction x Weight = Force (140 lbs)
Coef Static Fricton = Force / Weight
Coef Sliding Friction x Weight = Force (50 lbs)
2006-10-25 22:49:20 · answer #2 · answered by Roadkill 6 · 0⤊ 0⤋