role of friction in rolling
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8/12/2019 Role of Friction in Rolling
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µsN
F − f S
aC α
aC = αR
f S = F
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aC =P
F
M = F − f S
M
α =P
τ
I = − Rf S
I
aC = − αR
⇒ F − f SM
= R2f SI
f S
⇒ f S = − IF ( I + MR2 )
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F + f S aC
aC =P
F
M = F + f S
M
α =P
τ
I = R ( f S − F )
I
aC = − αR
⇒ F + f SM
= R ( f S − F )I
f S
⇒ f S = ( MR2
− I )( MR2 + I ) x F
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• I > 0 and I < M R2 f S
M R2
• I = M R2
F 1 F 2
F 1F 2
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⇒ F 1
R − I MR
= F 2
R
2 + I MR
F 2
⇒ F 1F 2
= ( R2 + I
MR )( R −
I
MR )
⇒ F 1F 2
= ( MR2 + 2I )
2 ( MR2− I )
θ
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