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pishuonlain [190]
3 years ago
5

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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