Recent content by deathkamp

Ah I used the wrong stuff, KE rotational is .5*I*w2, I corrected it. And for KE final i used I2 calculated value. Thanks guys.

thank you, I fixed it now, the only thing that concerns me is for the Kfinal. I can just add both the ant and cylinder mass together, or must I find each of their kinetic energy separately then add them to get kfinal?

Alright beer with me on the math becasue I want to check my answers to both part a and b Part A) I1*w1=I2*w2 I1=.5*m*r2=.5*(.03*(.0575meter2)) = 49.5*10-6 w1= 300/60=5 5*2pi= 31.42rad/sec The ants inertia is I=(.01*(.0575^2))= 33.06*10-6 I2=(49.5*10-6 + 33.06*10-6) = 82.56-6...

So for getting I2 the mass will be the cylinder mass + the ants mass correct? And my intial assumption about w2=w1 cause the radiuses does not change is that correct? Since w2=(r1/r2)^2*w1?

I was doing some thinking an made the conclusion that the conservation of angular momentum is conserved therefore I1*w1=I2*w2. Where I is the inertia So w2=(r1/r2)^2*w1 Where w2 is the final angular velocity an I can get the final frequency from...

@haruspex 300 rev/min =31.42 rad/sec(300/60=5 5*2pi= 31.42rad/sec), also since you stated it has nothing to do with the radius this means w=31.42 rad/sec, which saves me some work. The thing I don't get is how do I get the wfinal which is after the ant landed so that I can then convert into...

Homework Statement [/B] I messed up the original thread in terms of information, so I made a new better one. Ok here goes: I have a problem where a right circular cylinder with diameter .115meter and a mass of .03kg is rotating at 300 rev per min. Now an Ant which weighs .01kg collides with...

Sorry for double posting but I can't really find Ffinal because I don't see how I can use the initial frequency of 300 to get the final frequency?

Omg sorry I uploaded the wrong picture, its this one. Please disreguard the image in my first post. Also for #1 part a, I need to get the final rev/min after the ant falls on it, so I am thinking, w=2*pi*f. But I have two unknowns because I don't know how to get f? unless w= winitial which is...

Homework Statement Hi I know my picture has 2 problems, but let's just focus on the first problem parts a and b. So for part a it ask for the final frequency after the ant landed, and part b is the kinetic energy difference. Basically the ant=.01kg, diameter of cylinder is .115m, the weight of...

Thank you. And for part b did you get an answer around 84 point something, casue I used the theta=w0(t)+.5*a*t^2 equation?

since theta=35rad, w0=74.7rad/s, T=2.25s, A=33.2, I would use V = w0 + A*T correct?, ok Ived tried a few of them with V in them and none are giving me 48.2. I used, for example tried theta=((w0+v)/2)*t and V^2=w0^2+2*A*theta, can you please tell me what I am doing wrong?

For part c, the angular speed is an inital or final speed? meaning is it w0 or w?

Sorry for double post, but did you get around to look at this CWatters?

For part b all I did was multiply the angular velocity by the time to get the Angle in radians. so 74.7*2.25=168.08rad I am getting 48.2rad/s for part c, which SUVAT formula did you use? Please tell me? And for part D I found out that since the object can rotate or accelerating(translating)...