Answer:

Explanation:
information we have:
mass: 
lenght: 
frequency: 
time: 
and from the information we have we can calculate the angular velocity  . which is defined as
. which is defined as 


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Now, to calculate the torque
We use the formula

where  is the moment of inertia and
  is the moment of inertia and  is the angular acceleration
 is the angular acceleration
moment of inertia of a uniform rod about the end of it:

substituting known values:

for the torque we also need the acceleration  which is defined as:
 which is defined as: 

susbtituting known values: 

and finally we substitute  and
 and   into the torque equation
  into the torque equation  :
: