1. What do the values of Mu, and Mu k depend upon? 2. A 0.5-kg block is moving a
ID: 1278756 • Letter: 1
Question
1. What do the values of Mu, and Mu k depend upon? 2. 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, (2 points) Show all the equations. 3. If experimental data is normally distributed what percentage fits within (mean plus minus delta m) which is a stand dev? What percentage of data that fits within (mean Plus minus 2 delta.)? 4. In order for the force sensor to operate properly, what needs to be done before taking any measurements? 5. What information is presented by the Friction vs Applied force graph on AB, BC regions and at point B.Explanation / Answer
1) mu_s and mu_k depends on teh molecular nature of the surfaces in contact and their relative smoothness.....
2) fk = mu_k*N == mu*k*mg ....
mu_k = fk/(mg) = 20/(0.5*9.81) = 4.07 ....
5) in the AB region wit the applied force,frictional force is also increases....the body is at rest...from point B onwards....body starts sliding....from B to C the body moves with constant velocity
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