(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

1. There is m1 on an incline connected to m2 by a string through the pulley at the top of the incline. The incline is frictionless and the string pases through the center of mass of each block. The pulley has a moment of inertia I and a radius r. (a) Find the net torque acting on the system. (b) Write an expression for the total angular momentum of the system about the center of the pulley when the masses are moving with a speed v. (c) Find the acceleration of the masses from your results for parts (a) and (b) by setting the net torque equal to the rate of change of the angular momentum of the system

2. Relevant equations

Torque=dL/dt

L=I*w

T=F*r

3. The attempt at a solution

1. So I used Newton's 2nd law to get the acceleration as:

(m2*g*sin[tex]\theta[/tex]- m1*g)/ (m1+m2+(1/2)M)

However, M which is mass of the pulley is not given. I can make M=2I/r^2

I still don't get the right answer for net torque. It should be rg(m2*sin[tex]\theta[/tex]-m1)

Anyone know if I am on the right track ?? Any help will be appreciated

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# Homework Help: Some angular momentum problems

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