Anna applies a force of 19.5 newtons to push a book placed on a table. If the normal force of the book is 51.7 newtons, what is the coefficient of kinetic friction?

Question

A) .01
B) .20
C) .38
D) .48

Answer 1

normal force * coefficent=friction
solve for coefficient

In this case friction 19.5
Normal force is 51.7N

Answer 2

21

Answer 3

so whats the answer....

Answer 4

this answer sucks

Answer 5

So if you divide 19.5 / 51.7 the answer is .38 so C is the answer.