Net Torque of a CD: Mass 17 g, Radius 6 cm, Acceleration 23 rad/s

AI Thread Summary
To determine the net torque acting on a CD with a mass of 17 g and a radius of 6 cm, the moment of inertia is calculated as 306 g·cm². The angular acceleration is found to be 52.5 rad/s². The torque can be calculated using the formula torque = (magnitude of force) × (radius of lever arm). Participants are discussing how to find the force needed to apply this formula effectively. The conversation emphasizes collaboration to solve the problem.
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A CD has a mass of 17 g and a radius of 6.0 cm. When inserted into a player, the CD starts from rest and accelerates to an angular velocity of 23 rad/s in 0.36 s. Assuming the CD is a uniform solid disk, determine the net torque acting on it.



I found the inertia which is 306 and got the angular acceleration which is 52.5i think those are the right values

im stuck please help
 
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torque=(mag of force)(radius of lever arm)
you already have the radius, so just find the force now

What do you have to find the force? ill help you from there
 

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
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Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
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