Force Completion This test can be saved and resumed later. w Question Completion

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Force Completion This test can be saved and resumed later. w Question Completion Status: QUESTION1 What do the values of us and k depend upon? (Respectively, the static and kinetic coefficients of friction) ·Hint: This type of friction model is called Coulomb Friction or Damping and the answer may be unintuitive so reading about this type of friction is recommended. C. a. only on the materials in contact and nothing else b the materials in contact and their relative velocities C. material cholce and temperature d. material choice and contact surface area QUESTION2 A 05-kg block is pulled at constant speed on a horizontal surface. The friction force acting on the block is 2.0N, calculate pk y apparent to you, draw a free body diagram and then invoke Newton's second law. You know constant speed means acceleration is ze Hint: If the answer is not it is possible for these coefficients to be larger than 1 . 0.24 Click Save and Submit to save and submit. Click Save All Answers to save all answers

Explanation / Answer

A) option (a) is correct, only the materials which are in contact with each other

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b)

F= umg

u= 2/(0.5*9.8)= 0.408

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Comment in case any doubt . Goodluck

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