Ahorizontal force of 100 n is used to pull a crate, which weighs 500 n, at constant velocity across a horizontal floor. what is the coefficient of kinetic friction?

The coefficient of kinetic friction is 0.2.

The velocity is constant.

Therefore,

acceleration  = 0 m/s²

Net force = 0

Therefore,

100 - f = ma

100 - f = m × 0

100 - f = 0

f = 100Newton

f = μN

where

N= normal force

μ = coefficient of kinetic friction

100 = 500μ

μ = 100 / 500

μ = 0.2

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0.2

Explanation:

Horizontal force=100N

Weight of crate=500 N

We have to find the coefficient of kinetic friction.

Normal ,N=Weight=500N

Horizontal force,

Where =Horizontal force

N=Normal force

=Coefficient of kinetic friction

Substitute the values in the formula

Hence, the coefficient of kinetic friction =0.2

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .

their crystal patterns have been disrupted by stress