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Gwar [14]
3 years ago
9

A book has a weight of 15 N. What is the mass of the book

Physics
1 answer:
Ahat [919]3 years ago
6 0

Answer:

m = 1.531kg

Explanation:

F = mg

m = F/g

m = 15/9.8 = 1.531kg (Approximately)

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Answer:

Ff = 839.05 N

Explanation:

We can use the equation:

Ff = μ*N

where <em>N</em> can be obtained as follows:

∑ Fc = m*ac   ⇒   N - F = m*ac = m*ω²*R    ⇒  N = F + m*ω²*R

then if

F = 32 N

m = 133 Kg

R = 0.635 m

ω = 95 rev /min = (95 rev / min)(2π rad / 1 rev)(1 min / 60 s) = 9.9484 rad /s

we get

N = 32 N + (133 Kg)*(9.9484 rad /s)²*(0.635 m) = 8390.53 N

Finally

Ff = μ*N = 0.10*(8390.53 N) = 839.05 N

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