Question

A disk-shaped platform has a known rotational inertia. The platform is mounted on a fixed axle and rotates in a horizontal plane, as shown above. A student wishes to determine the frictional torque exerted on the platform by the axle as the platform rotates. The student has access to equipment that would usually be found in a school physics laborator

Answer 1

The frictional torque exerted on the platform by the axle as the platform rotates will be;

$\rm T_f \theta =\frac{1}{2} I [\omega^2-\omega_0^2]$

What is torque?

Torque is the force's twisting action about the axis of rotation. Torque is the term used to describe the instant of force. It is the rotational equivalent of force. Torque is a force that acts in a turn or twist.

The amount of torque is equal to force multiplied by the perpendicular distance between the point of application of force and the axis of rotation.

Work done by the frictional torque = Change in the rotational kinetic energy of the wheel

$\rm T_f \theta =\frac{1}{2} I [\omega^2-\omega_0^2]$

Where,

$\rm T_f$ is the frictional torque

$\rm \omega$ is the final angular velocity

$\rm \omega_0$ is the initial angular velocity

$\rm \theta$ is the angular displacement

Hence, the frictional torque exerted on the platform by the axle as the platform rotates will be;

$\rm T_f \theta =\frac{1}{2} I [\omega^2-\omega_0^2]$

To learn more about the torque, refer to the link;

brainly.com/question/6855614

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