Can someone please help me with these ice skater questions? it is not homeowrk, just a study guide.?
48) An ice skater has a moment of inertia of 5.0 kg,m2 when her arms are outstretched. At this time she is spinning at 3.0 revolutions per second (rps), If she pulls in her arms and decreases her moment of inertia to 2.0 kg’m2, how fast will she be spinning? A) 2.0 rps B) 3,3 rps C) 7.5 rps D) 10 rps 49) A figure skater rotating at 5.00 rad/s with arms extended has a moment of inertia of 2.25 kg,m2. If the arms are pulled in so the moment of inertia decreases to 1.80 kg.m2, what is the final angular speed? A) 2.25 rad/s B) 4.60 rad/s C) 6.25 rad/s D) 0.81 rad/s
Can Someone please help me with this Moment problem?
This crowbar is subjected to a vertical force P = 110N at the grip wheas it takes a force of F = 690 N at the claw to pull the nail out. Find the moment of each force about oiunt A and determine if P is sufficent to pull out the nail. The crowbar contacts the board at point A. here is the diagram for the question: http://i214.photobucket.com/albums/cc279/ejhumphrey/Q3.jpg
Can someone help with this moment of inertia / torque? Thanks! :)?
the moment of inertia of a bar or rod through its midpoint is 1/12 ML^2 where M is the mass and L is the length so for this object the moment is 1/12 x 0.2kg x (0.5m)^2 = 0.0042kgm^2 torque is related to angular acceleration by torque = moment of inertia x angular accleration (this is the rotational analogy of F = ma) therefore, angular accel = torque/I = 5x10^-3Nm / 0.0042 kgm^2 = 1.2 rad/s/s after 2 s, its angular velocity is 1.2 rad/s/s x 2s = 2.4 rad/s and it has traveled through an angular displacement of theta = 1/2 alpha t^2 = 1/2 x 1.2rad/s/s x (2s)^2 = 2.4 rad
As an INTJ, how can I focus on living in the moment?
Yeah I don't really BELIEVE in it, not like say horoscopes and such but like I said at this moment I've found my personality close enough to the point I just claim it at the moment. I hope some of the replies here can help me become more than that. I tried to volunteer but because of the times.. there is a waiting list to do that too!
Anxiety/ surreal moments freaking me out... help!?
so iv been experiencing surreal anxiety moments more and more ever since i smoked weed a few weeks ago and had a really bad trip. it was surreal paranoid moments times 1000. my heart was beating uncontrollably. so im absolutley done smoking. i never really did it was just for the hell of it but no more. but since then.. iv been having lots of surreal moments. ill just be standing around at work and boom.. it feels like im not really there. then i snap out of it.. kinda. it just messes with my head. and just right now i got home and was all alone cooking and i couldnt even keep cooking cuz i was freaking myself out. it really sucks. im active i go to the gym eat healthy have good friends. what is causing this??? ive always been a really chill person and this is just ridiculous. what can i do to get rid of this? do you think me smoking weed and freaking out affected my head? seriously any help will do. thank you