Work Done By a Constant Torque  Power & Moment of Inertia  Rotational Motion Physics Problems  Summary and Q&A
TL;DR
Learn how to calculate work done and average power exerted by a torque in rotational motion using torque, angular displacement, and time.
Questions & Answers
Q: How can the work done by a torque be calculated in rotational motion?
The work done by a torque can be calculated using the equation work = torque * angular displacement. The torque is the force applied multiplied by the lever arm, and the angular displacement is measured in radians.
Q: What is the average power exerted by a torque and how is it calculated?
The average power exerted by a torque is calculated by dividing the work done by the time taken. Average power = work / time. Power is measured in watts, and one joule per second is equal to one watt.
Q: How can the average power exerted by a torque be calculated when given the torque and angular velocity?
To calculate the average power exerted by a torque, multiply the torque by the angular velocity: average power = torque * angular velocity. Angular velocity is measured in radians per second.
Q: How can the amount of work performed by a torque be calculated in a given time period?
To calculate the work performed by a torque in a given time period, multiply the power exerted by the time taken: work = power * time. Make sure to convert the time into seconds for the calculation.
Summary & Key Takeaways

Work done in rotational motion can be calculated using the equation work = torque * angular displacement.

Average power exerted by a torque can be found by dividing the work done by the time taken.

In the provided examples, calculations are performed to find the work done and average power exerted in different scenarios.