The APsolute RecAP: Physics 1 Edition is a guided review through all ten units of classical mechanics. Areas of focus include kinematics, motion, energy, momentum, electricity and sound. Plus, a thorough review of essential math skills and graphing analysis through practical examples! Make sure to subscribe wherever you get podcasts, download the accompanying study guides for extra practice, and follow along on social media for the question of the day and course updates! The 2021 exam is on Wednesday, May 5th.
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episode 25: The APsolute RecAP: Physics 1 Edition - Rotational Motion - Moment of Inertia and Torque
What makes an object easy or difficult to rotate? Rotational inertia is a quantity that describes an object’s tendency to maintain its rotational motion about an axis. (1:02) Torque is equal to moment of inertia multiplied by the angular acceleration (1:44). Try opening a door by pushing it very close to the hinges. Feels silly right? (5:40) The episode ends by putting the brakes on a bicycle wheel (6:53).
The Question of the Day asks: (8:11)
If the radius and mass of a ball are both doubled, how does the moment of inertia change?
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