3 years ago

I

Mathematics

1 answer:

jolli1 [7]3 years ago

6 0

Answer:

Acceleration equals zero because of constant velocity

$f - fr = ma \\ 70 \cos(30) - fr = 0 \\ 70 \cos(30) = fr \\ fr \: = 60.62$

coefficient

Fr = coefficient × r

60.62= ce ×100

0.60 = coefficient

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