L28_phys131_26nov07

# L28_phys131_26nov07 - top Assume that the ladder is...

This preview shows pages 1–3. Sign up to view the full content.

Summary for Lecture 28 on November 26, 2007: There were no new concepts; we just demonstrated and solved one statics problem: ( 29 . is rotation CCW 0 equations Two 0 F : Statics positive is CCW sin F r F r i i + = = = × = τ θ θ r F

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
A ladder of length L leans against a slippery wall (coefficient of friction μ =0). Alas, the coefficient of friction between ladder and floor is only μ =0.20. What is the smallest angle θ that the ladder can have with the floor and still permit you to climb to its very
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: top? Assume that the ladder is massless. L You (mass M) at the top θ ( 29 ( 29 ∑ ∑ = = equation 1 equations 2 F : STATICS i i τ θ F W Mg N F F ( 29 μ θ φ τ 1 tan sin cos cos sin but sin Mg L sin LMg 180 sin LF ) 180 sin( LMg Mg F Mg N Mg N F . . min for equal use N F F F F F W W y f W f W x = =-= =-=---= = = =-= ≤ = =-= ∑ ∑ ∑ φ...
View Full Document

## This note was uploaded on 04/09/2008 for the course PHYS 131 taught by Professor Reay during the Fall '08 term at Ohio State.

### Page1 / 3

L28_phys131_26nov07 - top Assume that the ladder is...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online