CH 7 HW key - Chapter 7 1. M=60kg, Hi=20kgm/s, Ka=1m, Kb=...

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Chapter 7 1. M=60kg, Hi=20kgm²/s, Ka=1m, Kb= 0.5m a. H a =I a ϖ a -> ω= H/I= H/ (mk²)= 20/ 60*1= 0.33 rad/s b. Hi=Hf= 20, Hf= I* ω b=mKb²=60* 0.5²* ωb=20 -> Wb= 1.33 rad/s 2. ωa= 20 rad/s, Ka= 30cm, Kb= 60 cm, ωb=? Hi=Hf m Ka² ωa= m Kb² ωb ωb= Ka² ωa/ Kb²= (30²* 20)/ 60² = 5 rad/s when you have m on both side of the equation you can just divide both sides by m and it disappears . Also notice the pattern between k and angular velocity from the last 2 problems. When you double k angular velocity is reduced by 4x, when you cut k in half angular velocity increases by 4x. 3. M= 2kg, K=12cm=0.12m, ΣT= 100Nm, t= 0.2s
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This note was uploaded on 11/17/2011 for the course KNH 381 Lectur taught by Professor Walsh during the Summer '11 term at Miami University.

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CH 7 HW key - Chapter 7 1. M=60kg, Hi=20kgm/s, Ka=1m, Kb=...

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