horizantal surface, a force of 10 newtons is required. The force of friction between the surface and the object is....?
What is a equation i can use for this?
2007-12-17 15:44:50 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Physics
The friction force is μmg where μ is the coefficient of friction. The mass of the object is found from Newton's Second Law:
20 N = mg
Solve this equation for the mass m, or simply substitute 20 N for mg in the equation below.
10 N = μmg
Then solve for the coefficient of friction μ.
2007-12-17 15:54:04 · answer #1 · answered by jgoulden 7 · 0⤊ 0⤋
Newton's second law: law of acceleration:
F1 = 10 N
Ff - force of friction
m a = F1 - Ff
but because you want to keep the object moving at constant velocity a = 0 so
Ff = F1 = 10 N
Ff = 10 N
Ff= μk W
W - weight
μk = Ff / W = 10 /20 = 0.5
μk - coefficient of kinetic friction
2007-12-17 15:58:04 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Constant speed implies, friction = applied force = 10 N
μ = friction / Normal {vertical} force = 10 /20 = 0.5
2007-12-17 15:59:50 · answer #3 · answered by Pearlsawme 7 · 0⤊ 0⤋
you guys all 100% wrong. it's asking for force of friction, not the coefficient.. it's -10 N because the speed is constant
2016-12-05 10:13:52 · answer #4 · answered by Ryan 2 · 2⤊ 0⤋
how does the coefficient have anything to do with this?
2014-02-01 09:03:59 · answer #5 · answered by Eric Cao 2 · 0⤊ 0⤋