# Net Torque

## Homework Statement

A block of mass m1 = 1.80 kg and a block of mass m2 = 6.05 kg are connected by a massless string over a pulley in the shape of a solid disk having radius R = 0.250 m and mass M = 10.0 kg. These blocks are allowed to move on a fixed block-wedge of angle θ = 30.0° as in Figure P10.37. The coefficient of kinetic friction is 0.360 for both blocks

Determine the acceleration of the two blocks, and the tension on the right side of the pulley.

## Homework Equations

tNET=Iw<---omega
I(disk)=(1/2)mr^2

## The Attempt at a Solution

I used the equation above for net torque and found that a(tangential)=(r*tNET)/I. I know the tensions of the blocks times the radius gives me the torque but wouldn't one of them be negative? I am also having trouble finding the net forces on the blocks.

#### Attachments

• pse6_p10-37.gif
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Doc Al
Mentor
I used the equation above for net torque and found that a(tangential)=(r*tNET)/I.
OK.
I know the tensions of the blocks times the radius gives me the torque but wouldn't one of them be negative?
One tension force exerts a clockwise torque, the other a counterclockwise torque.
I am also having trouble finding the net forces on the blocks.
Analyze the forces on each block and apply Newton's 2nd law. That will give you two more equations.

thanks Doc, I figured out the problem...I forgot to compensate for the second mass on an incline hence, trig. ughhh...