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

We've just started Torque and I hate it, just to let everyone know. Can't wrap my head around anything remotely three dimensional.

Anyyyyway.

A 15 kg object and a 10 kg object are suspended, joined by a cord that passes over a pulley with a radius of 10 cm and a mass of 3kg. The cord has a negligible mass and does not slip on the pulley, which rotates on its axis without friction. The objects start from rest 3 m apart. treat the pulley as a uniform disk, and determine the speeds of the two objects as they pass each other as prescribed, below.

a) Calculate the acceleration of the two masses using Newton's laws in order to determine their speed when the meet.

b) Calculate speed directly using conservation of energy.

2. Relevant equations

T = r x F

Summation T = Ia(angular acceleration)

I for Disk = 1/2Mr^2

3. The attempt at a solution

I really have very little idea what to do, but this is what Ive done so far for (a)

Isolate mass One

Fnet = -ma

Ft - mg = -ma

Isolate pulley

Summation Torque = Ia

I = 1/2Mr^2

= 1/2(3)(0.1)^2

And then I honestly don't know what to do :(

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# Homework Help: Torque with Pulley and Hanging Masses

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