{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

CH 7 HW key

# CH 7 HW key - Chapter 7 1 M=60kg Hi=20kgm/s Ka=1m Kb= 0.5m...

This preview shows pages 1–2. Sign up to view the full content.

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

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

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}