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

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 (meant Sm) which is a stand.dev.? What percentage of data that fits within (mean plusminus delta_m)? 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

(1)Value of coefficient of friction depends on the nature of surfaces in contact ( smooth or rough) and the nature of material of the surfaces in contact.

(2) Fk=20 N

Fk=uk ma

20=uk(0.5)(9.8)

uk=4.08

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