Mack
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 Dec 3 comment Kinetic Energy And Rotational Motion So, the only problem I had with my approach is the miscalculation of the translational velocity? Would I still have to use a force approach to find the acceleration of the can? Dec 2 comment Finding Rotational Kinetic Energy Of A Clock Even with the corrected values, I still get a wrong answer. The answer yielded from the calculations above is $3.80\cdot 10^{-4} J$, which is wrong. Dec 1 comment Tensions And Pulleys With Masses I actually figured it out. However, I have a new question: if the tension forces on either side of the pulley are different, then why is there only one acceleration for the two blocks and the particles on the outer rim of the pulley? Dec 1 comment Tensions And Pulleys With Masses I've sort of run into a road-block trying to solve this problem. I try to solve for the acceleration, but I have no way of eliminating the unknowns from my equations; what still remains is the two tensions forces. So, I tried to figure out how they were related through torque on the pulley; and despite the fact that there is a relationship, it introduces another unknown, namely, the torque. How do I solve for the acceleration? Dec 1 comment Tensions And Pulleys With Masses Oh, yes...The pulley would definitely have more rotational inertia, and that would diminish the amount of force transmitted, right? Nov 30 comment Torque And Moment Of Inertia What is effective mass, and what is c.g.? Nov 26 comment Calculating Moment Of Inertia Oh, so basically your process involves reconstituting the door by squishing the height, and uniformly concentrating the mass over the width? Nov 26 comment Calculating Moment Of Inertia So, there isn't really any intuitive way of seeing that the height isn't required? Nov 25 comment Calculating Moment Of Inertia Why is the height not needed, though? Nov 24 comment Finding Constant Angular Acceleration Thank you very much! I completely forgot about the rotational kinematic equations, until you had refreshed my mind. Nov 24 comment Finding Constant Angular Acceleration @leongz Well, how would I find the time interval during which the centrifuge slows down? Nov 23 comment Does Earth's Rotation Affect Its Shape? Is this outwards force due to rotation perhaps the centrifugal force? Nov 23 comment Does Earth's Rotation Affect Its Shape? @Serg And so the earth elongates about the equator for the same reason that arms start move away from my sides when I rotate around? If this is true, is there some way to describe this in term of newton's laws, or something of the like? Nov 23 comment Does Earth's Rotation Affect Its Shape? @Serg How and why does the rotation affect the earth's shape? Nov 20 comment Elastic Collision And Momentum @dmckee I believe that is what I was doing, in my other post. I just don't know if I am solving the collision correctly; and I wasn't sure if I could combine non-vector expressions into a vector equation. Nov 20 comment Elastic Collision Between Two Objects Sorry, I did edit my post, and I don't have the capabilities, yet, to offer a bounty. This took me so long to type. Nov 20 comment Elastic Collision And Momentum Nov 20 comment Elastic Collision And Momentum So, are you saying that kinetic energy is represented by the variable p? Nov 20 comment Elastic Collision And Momentum How do you derive something like this $p^2/2m$ Nov 20 comment Elastic Collision And Momentum I don't understand how you get this part: $p^2/2m_1=m_1gh\rightarrow p=m_1\sqrt{2gh}$