ME208_Fall2010_MT1_Solutions

ME208_Fall2010_MT1_Solutions - θ&& 2 r& θ& e...

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ME 208 DYNAMICS ( Section 1 , R. Soylu ) FIRST MIDTERM EXAMINATION December 3, 2010 List Number : Name : Surname : ATTENTION Closed book and notes. Time allowed : 120 minutes Number of questions : 4 ( not equally weighted ) Good Luck Signature : Question 1 ( 25 points ) Question 2 ( 15 points ) Question 3 ( 10 points ) Question 4 ( 25 points ) Total ( 75 points ) Useful formulae Given on the back of this page.
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USEFUL FORMULAE : v = ds dt a = dv dt = 2 2 d s dt v dv = a ds v r = dr dt r a r = dv dt r = 2 2 d r dt r v = v 0 + a c t s = s 0 + v 0 t + 1 2 a c t 2 v 2 = v 0 2 + 2a c (s – s 0 ) v r = v t e r ; v = ρ β a r = a t t e r + a n n e r a t = v = s a n = v β = ρ β 2 = 2 v ρ t e r = β n e r 3 2 2 2 2 dy 1 dx d y dx + ρ = r r = r r e r v r = r r e r + r θ e θ r a r = ( r && - r θ 2 ) r e r + ( r
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Unformatted text preview: θ && + 2 r & θ & ) e θ r r e r & = θ & e θ r e θ r & = -θ & r e r v r = ( R & ) R e r + ( R θ & cos φ ) e θ r + ( R φ & ) e φ r a r = ( R &&- R φ & 2- R θ & 2 cos 2 φ ) R e r + ( cos R φ d dt (R 2 θ & ) – 2R θ & φ & sin φ ) e θ r + ( 1 R d dt (R 2 φ & ) + R θ & 2 sin φ cos φ ) e φ r f ≤ μ N dU = F r • d r r P = F r • v r F ∑ r = m a r ' 1 2 U-= Δ T + Δ V g + Δ V e T = 1 2 mv 2 ; V g = mgh ; V e = 1 2 kx 2 ( ) 2 1 t t t t F dt = = ∑ ∫ r = 2 G r- 1 G r G r = m v r ( ) 2 1 t t O t t M dt = = ∑ ∫ r = 2 O H r- 1 O H r O H r = r r × G r...
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This document was uploaded on 02/17/2011.

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ME208_Fall2010_MT1_Solutions - θ&& 2 r& θ& e...

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