12. A) You are asked to determine what the kinetic force of friction is between a book and a desk. If all you have is a scale that measures force, what would you need to do to determine the
kinetic friction force?
B) You are asked to determine what the static force of friction is between a book and a desk. If all you have is a scale that measures force, what would you need to do to determine the kinetic
friction force?

Answer: it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.explanation:   we have equation of motion ,where s is the displacement, a is the acceleration, u is the initial velocity and t is the time taken.average velocity = displacement/ time taken.average velocity = 10.69 miles/hr = 10.69*1.6*1000/(60*60) = 4.75 m/s4.75 = s/ts = 4. 1we also have acceleration = 2.18 m/s², initial velocity = 0 m/sso it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.

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Good moring let me you on this question the answer the electric force  have a good day ; )

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