Two blocks are placed at the ends of a horizontal massless board, as in the drawing. The board is kept from rotating and rests on a support that serves as an axis of rotation. The block on the right has a mass of 4.4 kg. Determine the magnitude of the angular acceleration when the system is allowed to rotate.

The angular acceleration is  

Explanation:

The  diagram for this question is shown on the first uploaded image (gotten from study website)

From the question we are told that

      The mass of the block on the right is  

       The mass of the block on the left is

       The distance of the left mass to the center is  

       The distance of the right  mass to the center is  

At the point the system is allowed to rotate the upward torque is mathematically evaluated as

substituting values

The moment of inertia of the system is  mathematically represented as

substituting values

The angular acceleration is mathematically represented as

substituting values

force is mass*acceleration.

we have a very small mass: 11.4*0.001 kg

if we want 0.035n of force, we need an acceleration:

0.035 = 11.4*0.001*a

a = 0.035/(11.4*0.001) m/s^2

c) up is the direction the magnetic force is acting on the charge.