- 1Q10. Moment of Inertia
- 1Q10.10 Inertia Wands Two wands with the same weight but different moments of inertia are used to demonstrate torque.
- 1Q10.20 Torsion Pendulum Inertia Use the torsion pendulum to determine the moment of inertia.
- 1Q10.30 Ring, Disc, and Sphere A ring, disc, and sphere – all of equal mass and diameter but unequal moment of inertia – are raced down an incline.
- 1Q10.35 All Discs Roll the Same A set of discs of different diameters are rolled down an incline.
- 1Q10.40 Racing Discs Two discs of identical mass, one weighted in the center and the other weighted at the rim, are rolled down an incline.
- 1Q10.50 Racing Cans Two soup cans race down an incline. One is filled with mainly liquid and the other with mainly solid food.
- 1Q10.55 Weary Roller Use container half-filled with rice.
- 1Q10.56 Viscosity A raw egg in a torsion pendulum damps more quickly than a boiled egg due to internal friction.
- 1Q20. Rotational Energy
- 1Q20.10 Adjustable Angular Momentum A pulley-mounted rod and two weights can be calibrated to display varying moments of inertia.
- 1Q20.30 Rolling Spool A spool rolled down an incline on its axle takes off when it reaches the bottom and rolls on its rim.
- 1Q20.41 Rolling Up an Incline A roller is timed as it rolls up an incline under a constant torque produced by a cord wrapped around the axle to a hanging weight.
- 1Q20.44 Rolling Pendulum A spherical bob can roll on a track of the same arc as its swing when suspended by a cord. Comparison of the motion in the two cases shows the effect of the rotational motion in rolling.
- 1Q20.50 Faster than G A ball at the end of a falling stick falls into a cup.
- 1Q20.55 Pennies on a Meter Stick Line a meter stick with pennies and drop one end with the other hinged. Happens to fast to see well.
- 1Q20.60 Falling Chain Chain falling on a scale reads three times the force of stationary chain
- 1Q20.70 Falling Meter Sticks Compare the rate of fall of one meter and two meter sticks.
- 1Q30. Transfer of Angular Momentum
- 1Q30.10 Passing The Wheel Pass a bicycle wheel back and forth to a person on a rotating stool.
- 1Q30.20 Drop Sandbags A person on a rotating stool holds out sandbags and drops them.
- 1Q30.30 Catch The Bag On The Stool Sit on the rotating stool and catch a heavy ball at arms length.
- 1Q30.40 Drop A Jug On A Rotating Platform Swirl a jug of water and then place it on a turntable that can rotate. Loss of angular momentum of the water results in a gain of angular momentum of the turntable.
- 1Q40. Conservation of Angular Momentum
- 1Q40.12 Rotating Platform and Dumbbells Demonstrate different moments of inertia with a student on a rotating platform.
- 1Q40.15 Rotating Stool and Long Bar Sit on the stool and hold a long bar with weights on the ends. Rotate the bar and you will move in the opposite direction.
- 1Q40.22 Rotating Hoberman Sphere Connect a ball bearing fishing swivel to a Hoberman Sphere mobile. Spin the mobile and pull the string. The sphere will spin faster when it collapses.
- 1Q40.23 Centrifugal Governor A centrifugal governor is used to demonstrate balance of forces.
- 1Q40.25 Pulling on the Whirligig Pull on the bottom mass of the whirligig.
- 1Q40.26 Pulling on the Whirligig A ball on a string rolls on the lecture table. In one case the cord wraps itself around a vertical rod. In the other, the cord is pulled through a hole in the table.
- 1Q40.30 Rotating Stool and Bicycle Wheel A person stands on a rotating stool, spins a bicycle wheel, and turns it over and back.
- 1Q40.40 Angular Momentum Train A circular track on a rotating platform and a train have the same mass. The train and track move in opposite directions.
- 1Q40.55 Buzz Button A 6″ plastic disc supported by a loop of string passing through two holes drilled 1/2″ apart.
- 1Q40.60 Sewer Pipe Pull Put “o” rings around a section of large PVC pipe to act as tires. Place on a sheet of paper and pull the paper out from under it.
- 1Q40.80 Hero’s Engine Variations of Hero’s Engine using steam, liquid nitrogen, and the vacuum chamber.
- 1Q50. Gyros
- 1Q50.10 Precessing Top A top is hand spun to show precession due to gravitational torque.
- 1Q50.20 Bicycle Wheel Gyro Spin a bicycle wheel mounted on a long axle.
- 1Q50.21 Bicycle Wheel Gyroscope A spinning bicycle wheel is held up by a wire.
- 1Q50.24 Walking the Wheel A spinning bicycle on a short axle dangles from a string held in the hand. Try to apply a torque that will bring the axle to a horizontal position.
- 1Q50.30 MITAC Gyro A commercial motorized gyro on gimbals.
- 1Q50.35 Gyro in Gimbals Push a cart with a gyro around the room.
- 1Q50.40 Suitcase Gyro Spin up a flywheel hidden in a suitcase and have a student turn around with it.
- 1Q50.41 Feel of a Gyro Hold a heavy gyro outfitted with good handles.
- 1Q50.50 Precession with High Quality Gyro Demonstrate the fundamental equation of precession, Q = IΩω, with a high precision gyroscope mounted on a counterweight.
- 1Q50.22 Suspended Bike Wheel A spinning bicycle wheel with handles is supported by loops of string tied to a crossbar that is hung by a single string. Push the ends of the handles horizontally in opposite directions; the bike wheel precesses.
- 1Q50.60 Gyro on Turntable A gyro in a gimbal sits on a rotating table.
- 1Q50.62 Airplane Turn Indicator An airplane turn indicator in which the gyro precesses about the axis of the fuselage.
- 1Q50.95 Air Bearing Maxwell’s Top Plans for an air bearing Maxwell’s top resting on a 2″ diameter ball with matching air bearing cup with tangential air jets to provide torque.
- 1Q60. Rotational Stability
- 1Q60.10 Bicycle Wheel Top Extend the axle of a weighted bike wheel and terminate with a rubber ball.
- 1Q60.25 Euler’s Disk A look at the motion of a spinning disk on a smooth surface.
- 1Q60.30 Tippe Top A tippy top will undergo a 180 degree change of orientation when spun.
- 1Q60.35 Spinning Football Spin a football on its side and it will rise up on its end.
- 1Q60.40 Tossing the Book A simple method of measuring the moments of inertia about the three axes before tossing the book.
- 1Q60.50 Spinning Lariat A rod, hoop, and flexible chain are attached to a hand drill.
- 1Q60.90 Marion’s Dumbbell A simple apparatus to demonstrate the non-colinearity of the angular velocity vector and the angular momentum vector. Helps students increase their understanding of angular velocity, angular momentum, and the inertial tensor. Theory and construction details.