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Friction and Circular Motion

WP_20160217_004.jpg
shouldn't it be:
v=( meu*R*g)^(1/2)
so then when rearranged,
meu= v^2/Rg
but that isn't the answer.
Reply 1
Avatar for ombtom
ombtom
17
μ is mu.

F = μR

F = (mv^2)/r = μR --> μ = (mv^2)/(rR)

R = mg, so μ = (mv^2)/(rmg) = (v^2)/(rg) = answer (1).

Edit: I used r as radius and R as the reaction force. We need more letters.
Reply 2
Avatar for 123PC
123PC
OP
4
Original post by ombtom
μ is mu.

F = μR

F = (mv^2)/r = μR --> μ = (mv^2)/(rR)

R = mg, so μ = (mv^2)/(rmg) = (v^2)/(rg) = answer (1).

Edit: I used r as radius and R as the reaction force. We need more letters.

Oh, okay thanks. Then the book's answer is probably wrong.
Reply 3
Avatar for ombtom
ombtom
17
Original post by 123PC
Oh, okay thanks. Then the book's answer is probably wrong.


What does the book say? I do make a lot of mistakes. :ashamed2:

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