Bozeman Science
Kinetic Energy
In this video Paul Andersen explains how the kinetic energy of an object if due to the motion of an object. Objects can have kinetic energy but they cannot have potential energy unless they are part of a system. He then explains how to...
Bozeman Science
Rotational Inertia
In this video Paul Andersen explains how the angular momentum of an object if a product of the rotational inertia and the angular velocity. The rotational inertia depends on the mass, radius and shape of the rotating objects. A sample...
TED-Ed
TED-Ed: The physics of the "hardest move" in ballet - Arleen Sugano
In the third act of "Swan Lake", the Black Swan pulls off a seemingly endless series of turns, bobbing up and down on one pointed foot and spinning around and around and around thirty-two times. How is this move - which is called a...
Bozeman Science
The Vector Properties of Angular Quantities
In this video Paul Andersen explains how a rotating system will have several quantities; including torque, angular velocity, angular acceleration and angular momentum. Each of these quantities have a vector property that can be...
Bozeman Science
Angular Momentum
In this video Paul Andersen explains rotating object have angular momentum. The angular momentum of a point object is the product of the distant from the center of rotation and the linear momentum. The angular momentum of an extended...
Bozeman Science
Rotational Motion
In this video Paul Andersen explains how a net torque acting on an object will create rotational motion. This motion can be described by the angular displacement, angular velocity, and angular acceleration. The linear velocity can be...
Curated Video
Why Do Tightrope Walkers Carry Long Poles when Walking on A Rope?
Carrying a pole helps the walker increase their rotational inertia, which aids in maintaining stability while walking over the narrow rope. The pole also adds more weight below the center of gravity of the walker, which is another bonus...
Flipping Physics
2017 #3 Free Response Question - AP Physics 1 - Exam Solution
My solutions to Free Response Question #3 from the 2017 AP Physics 1 Exam. Also included are my reflections on how to get more points on the exam. This Quantitative/Qualitative Translation question also works as a part of the AP Physics...
Flipping Physics
2018 #3 Free Response Question - AP Physics 1 - Exam Solution
My solutions to Free Response Question #3 from the 2018 AP Physics 1 Exam. Also included are my reflections on how to get more points on the exam. This Quantitative/Qualitative Translation question also works as a part of the AP Physics...
Flipping Physics
Parallel Axis Theorem Derivation
Deriving the Parallel Axis Theorem for moment of inertia or rotational inertia.
Flipping Physics
Merry-Go-Round - Conservation of Angular Momentum Problem
A 25 kg child is sitting on the edge of a merry-go-round. The merry-go-round has a mass of 255 kg and is rotating at 2.0 radians per second. The child crawls to the middle of the merry-go-round. What is the final angular speed of the...
Higgsino Physics
Jump in Artificial Gravity? - 5 Physics Questions Explained
Physics Quiz. 5 Popular questions answered. Can you solve these questions? Why do spaceships heat up when entering earth but not when exiting?, Why can I touch aluminum foil in the oven and not get burned?, Why are we able to see air...
Flipping Physics
(Energy Solution) Acceleration of a Wheel descending on a Rope
A rope is wrapped around a bicycle wheel with a rotational inertia of 0.68MR^2. The wheel is released from rest and allowed to descend without slipping as the rope unwinds from the wheel. In terms of g, determine the acceleration of the...
Flipping Physics
Dart with Thin Rod Collision - Conservation of Angular Momentum Demonstration and Problem
A 5.3 g dart is moving vertically at 16.5 m/s just before it collides with and sticks to a 33.9 cm long, thin piece of cardboard. If the dart hits the 71.8 g piece of cardboard 28.7 cm from its fixed end, to what maximum angle does the...
Flipping Physics
Introductory Rotational Form of Newton's Second Law Problem
A basic rotational form of Newton’s Second Law problem with only one force.
Flipping Physics
(1 of 2) Measuring the Rotational Inertia of a Bike Wheel
That’s right, we actually measure the rotational inertia of a bicycle wheel. How cool is that?
Flipping Physics
Angular Momentum of a Rigid Object with Shape Introduction
The equation for #AngularMomentum of #RigidObjects with shape is introduced and a simple example of angular momentum is solved for.
Flipping Physics
(Torque Solution) Acceleration of a Wheel descending on a Rope
A rope is wrapped around a bicycle wheel with a rotational inertia of 0.68MR^2. The wheel is released from rest and allowed to descend without slipping as the rope unwinds from the wheel. In terms of g, determine the acceleration of the...
Flipping Physics
Uniform Solid Cylinder Moment of Inertia Derivation
Deriving the integral equation for the moment of inertia or rotational inertia of a uniform solid cylinder.
Flipping Physics
Physical Pendulum - Period Derivation and Demonstration using Calculus
Calculus is used to derive the angular frequency and period equations for a physical pendulum. A physical pendulum is also demonstrated and real world calculations are performed. This is an AP Physics C: Mechanics topic. Content Times:...
Flipping Physics
Using Integrals to Derive Rotational Inertia of a Long, Thin Rod with Demonstration
We use integrals to derive the #rotationalinertia of a uniform, long, thin rod. And we demonstrate our answer is correct using a Rotational Inertia Demonstrator.
Flipping Physics
2 Masses on a Pulley - Conservation of Energy Demonstration
Mass 1 and mass 2 hang from either side of a frictionless #pulley with #rotationalInertia, I, and radius, R. What is the angular acceleration of the pulley? Use #ConservationOfEnergy
Flipping Physics
(2 of 2) Measuring the Rotational Inertia of a Bike Wheel
1) Calculating if our answer makes sense. 2) Why can’t we sum the torques on everything? 3) Finding the force of tension.