A string is wrapped along the rim of a wheel of the moment of inertia and radius . If the string is now pulled by a force of , then the wheel starts to rotate about its axis from rest. The angular velocity of the wheel after will be:
Given: Moment of inertia, Radius, Force, Time, Initial angular velocity, (since it starts from rest)
The torque acting on the wheel is given by:
Using Newton's second law for rotational motion, , we can find the angular acceleration :
Now, using the first equation of rotational kinematics to find the final angular velocity :
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