Recent content by sunniexdayzz

For our homework, we have to go to like 5 or 6 decimal places because it's online. Thank you sooooooo much! I will work on the other two parts and hopefully I won't need your help! Thanks again!

Finally lol I feel so dumb sometimes when it comes to physics! Can I check my answer? I got 5.1324756 kg m^2 / s^2

Okay .. so on the system there is gravity on the pulley, the tension pulling down on the pulley, the normal force pulling up on the pulley, the tension pulling up on the mass, and the gravity pulling down on the mass. How do i find the torque on the forces on the mass if I don't know how how far...

I don't know the difference between internal or external forces and which ones would contribute to the torque of the system. I don't really know what else to say?.. =[

Why do you care about the tension? Because the tension is pulling the pulley and making it rotate (at least i think so)

wouldn't the weight of the mass exert a force? so that would have something to do with the tension?

Sorry, I didn't mean to ask that. =] Okay, I thought there would be no torque on the hanging mass because it's not rotating? I'm assuming now that that is faulty. So how would I go about figuring out the torque on the mass? If that's even what I should be trying to do

Homework Statement Part A: A 5.73 kg mass is attached to a light cord, which is wound around a pulley. The pulley is a uniform solid cylinder of radius 9.14 cm and mass 1.26 kg. The acceleration of gravity is 9.8 m/s2 . What is the resultant net torque on the system about the center of the...

Homework Statement An Atwood machine is constructed using a disk of mass 2.4 and radius 23.4. What is the acceleration of the system? The acceleration of gravity is 9.8 . Picture: http://img.photobucket.com/albums/v356/SfTbLxMiShi/atwood.jpg Homework Equations \sumF=ma torque = I(alpha)...

thank you for your help! i figured out phase 1, but i am not sure about phase 2. i tried using conservation of energy from when the tension begins to the final length of the cord, using final kinetic energy + final potential energy = initial potential energy + initial kinetic energy and...

Homework Statement Consider a bungee cord of unstretched length L0 = 43 m. When the cord is stretched to L > L0 it behaves like a spring and its tension follows the Hooke’s law T = k(L − L0). But unlike a spring, the cord folds instead of becoming compressed when the distance between its...

the general case for a thin rod is I=\int(mr^2) with m=mass and r=radius but I don't know what it is for a curved rod. The rod in the problem is a semi circle about the origin in quadrants I and II with radius r

Find the moment of inertia when the wire of constant density shaped like the semicircle y=sqrt(r^2-x^2) where r is the radius is revolved around the x-axis I don't even know where to begin =[