What do the values of mu s and mu k depend upon? A 0.5-kg block is moving at con

Question

What do the values of mu s and mu k depend upon? A 0.5-kg block is moving at constant speed on a horizontal surface. The friction force acting on the block is 20N, calculate mu k. Show all the equations. If experimental data is normally distributed what percentage fits within (mean delta m) which is a stand.dev.? What percentage of data that fits within (mean 2 delta m)l? In order for the force sensor to operate properly, what needs to be done before taking any measurements? What information is presented by the Friction vs Applied force graph on AB, BC regions and at point B.

Explanation / Answer

multiple questions allowed to solve only 1 question at a time :

question 2)

given :::

mass = 0.5 kg

force = 20 N

we know the formula

Ff = Fn

Ff = 20 N

Fn = mg = 0.5 kg * 9.81 m/s 2 = 4.9 N ( normal force)

Ff / Fn = u

20 N / 4.9 N = u = 4.08 ================>>>>>>>>>>>answer)

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