Recent content by Very_Unwise
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Hinged rod rotating, falling and hitting a mass
Alright alright, thanks for the help :D- Very_Unwise
- Post #12
- Forum: Introductory Physics Homework Help
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Hinged rod rotating, falling and hitting a mass
Okay, so I(rod+snowball) should be Irod + Isnowball which is 1/3*M*L^2+ m*L^2 , m=1/9*M I(rod+snowall) = 1/3*M*L^2 + 1/9*M*L^2 = 4/9*M*L^2 Irod* ω1= I(rod+snowball)*ω2 1/3*M*L^2 * sqrt(3g/L) = 4/9*M*L^2*ω2 crossing out M*L^2 1/3*sqrt(3g/L)=4/9*ω2 ω2*4/3=sqrt(3g/L) ω2=sqrt(3g/L)*3/4- Very_Unwise
- Post #9
- Forum: Introductory Physics Homework Help
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Hinged rod rotating, falling and hitting a mass
Yes that's true, substituting g=9.81 does make things quite messy. Thank you- Very_Unwise
- Post #7
- Forum: Introductory Physics Homework Help
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Hinged rod rotating, falling and hitting a mass
Okay, so my previous calculations were wrong because the moment of inertia for the rod changes after collision? Meaning I(combined object) doesn't equal Irod? To find the new moment of inertia i have to find the new center of mass for the combined object, which is (0*1/9*M +1/2*L*M)/10/9*m...- Very_Unwise
- Post #5
- Forum: Introductory Physics Homework Help
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Hinged rod rotating, falling and hitting a mass
Okay, so instead of m*r*v=m*r*v ill use I*ω = m*r*v? Substituting v=ω*L gives me I*ω = m*L^2*ω That gives me i*ω = 10/9*M *L*v v=ω*L i*ω1 =10/9*M*L^2 * ω2 , i=1/3*M*L^2, ω1 = sqrt (29.43/L), I=Irod I rod*sqrt (29.43/L) = 10/9 *M*L^2*w solving for w using symbolab gives me w = (1.627*sqrt...- Very_Unwise
- Post #3
- Forum: Introductory Physics Homework Help
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Hinged rod rotating, falling and hitting a mass
Assuming no friction anywhere, no drag and perfect inelastic collision Using conservation of mechanical energy i can determine the rotational speed of the rod right before collision occurs. mgh=1/2*i*w^2 center of mass falls 1/2*L so we have: M*g*1/2*L = 1/2*(1/3*M*L^2)*w^2 Solving for w...- Very_Unwise
- Thread
- Conservation of momentum Falling Mass Rod Rotating
- Replies: 11
- Forum: Introductory Physics Homework Help