Virtually Passed
Disk rolling down incline problem
Find the acceleration of the center of mass of the disk. 1. Use F = ma AND M = I alpha 2. Assume pure roll ie a = r alpha 3. Check validity of assumption ie, F less than Fmax 4. If F less than Fmax, THEN assumption is true 5. If F...
Flipping Physics
How the Force of Tension on a Pulley Changes with Acceleration
We predict and measure the force of tension acting on a pulley while the system is at rest and accelerating.
Flipping Physics
Nonuniform Circular Motion - Ball in a Vertical Circle
Analyzing the velocities, accelerations, forces, and nonuniform circular motion of a ball on a string moving in a vertical circle. Want Lecture Notes? Content Times: 0:00 Reviewing Uniform Circular Motion 0:30 Nonuniform Circular Motion...
Flipping Physics
Introductory Uniformly Angularly Accelerated Motion Problem - A CD Player
What is the angular acceleration of a compact disc that turns through 3.25 revolutions while it uniformly slows to a stop in 2.27 seconds?
Flipping Physics
Angular Accelerations of a Record Player
A record player is plugged in, uniformly accelerates to 45 revolutions per minute, and then is unplugged. The record player (a) takes 0.85 seconds to get up to speed, (b) spends 3.37 seconds at 45 rpms, and then (c) takes 2.32 seconds to...
Flipping Physics
The Scalar Nature of Variables in Rotational Motion Equations
An honest look at vectors vs. scalars in rotational motion equations. Want Lecture Notes? Content Times: 0:00 All the equations 0:51 Common mistake 3:28 The correct equations
Flipping Physics
Torque Introduction
Translational and Rotational motion are demonstrated and reviewed. Torque is introduced via the equation and several door opening demonstrations. Moment arm or lever arm is defined and illustrated.
Flipping Physics
Rotational Equilibrium Introduction (and Static Equilibrium too!!)
An introduction to Rotational Equilibrium with a review of Translational Equilibrium and demonstrations. Wait there’s more … Static Equilibrium!
Professor Dave Explains
Angular Motion and Torque
More spinning things! Records, and wheels, and doors, and other fun things. The equations that govern this kind of motion are just like the ones we learned in kinematics, except they have different symbols. Lots of funky Greek letters in...
Flipping Physics
Demonstrating Rotational Inertia (or Moment of Inertia)
Thank you to Arbor Scientific for letting me borrow their Rotational Inertia Demonstrator to … uh … demonstrate rotational inertia.
Flipping Physics
Rotational Form of Newton's Second Law - Introduction
A very basic introduction to the rotational form of Newton’s Second Law of Motion by way of its translational form.
Bozeman Science
Bozeman Science: The Vector Properties of Angular Quantities
In the following video Paul Andersen explains how a rotating system will have several quantities; including torque, angular velocity, angular acceleration and angular momentum. [7:15]
Khan Academy
Khan Academy: Change in Period and Frequency From Change in Angular Velocity
Sal Khan demonstrates solving problems that find the change in the period from the change in angular velocity and finds the change in frequency from the change in angular velocity. [6:47]
Khan Academy
Khan Academy: Relating Angular and Regular Motion Variables
In this video David shows how to relate the angular displacement to the arc length, angular velocity to the speed, and angular acceleration to the tangential acceleration. [14:36]
Khan Academy
Khan Academy: Distance or Arc Length From Angular Displacement
Relating angular displacement to distance traveled (or arc length) for a ball traveling in a circle. Derivation of formula for arc length.
Khan Academy
Khan Academy: Connecting Period and Frequency to Angular Velocity
Definition of period and frequency for an object moving in a circle. Connecting period and frequency to the magnitude of the angular velocity. [6:44]